baby bottles and sippy cups
Baby Bottles & Sippy Cups: Materials, Testing & Safety
Choosing a bottle isn’t just a choice between glass, plastic, silicone and steel.
Read the category introduction
Choosing a bottle isn’t just a choice between glass, plastic, silicone and steel. A glass bottle can still have a polypropylene ring, a stainless cup can hide solder, and a good material becomes a poor product when its valve traps liquid nobody can see or dry. We reviewed 13 exact products across their whole fluid path, and where the evidence stops we say so.
Our standard for baby bottles and sippy cups
We assess the whole fluid path, cleanability, construction and exact-product identity. Leading design requires disclosed liquid-contact parts and no open recall; manufacturer claims remain distinct from independent tests.
Read the full category standard
Leading design means the whole fluid path is short and disclosed part by part, no part that touches the liquid is unresolved, there is no open recall of that exact product, and for a stainless product the base construction is stated. It is a judgment about architecture and disclosure. It is not a claim that the product has been proven safe, and none of the products on this page has an independent laboratory report for its exact SKU, so each one carries a verification flag.
Trade-offs means the evidence shows a specific cost: a polymer body that generic studies found releasing particles, a vent that adds polymer parts and narrow passages to clean, a removable valve that has to be separated and dried, or a fluid path whose component list is only partly disclosed. When part of the fluid path is unstated we can't clear the design, so Trade-offs is our estimate: missing evidence, not a finding against the product.
Avoid means an open recall of that exact product with no remedy available. No product on this page is in that tier.
What we record for every product. Every part that touches the liquid and what it is made of; single-wall or insulated construction; whether a stainless base is soldered, and whether that is a manufacturer's statement or an independent verification; heat, sterilizer, dishwasher and microwave instructions; how many parts there are, whether the wet path can be seen, and whether a vent, valve or straw needs a brush; the claims and testing behind it; certifications and their scope; recalls and lawsuits, kept apart; and what would change our verdict.
Independent tests. A test counts as evidence about a product only when it names that product. We show third-party results that cover a product line, or a bottle whose model or generation isn't confirmed, and say how closely each one matches. A result for an earlier version of a bottle is shown apart and never applied to the current one. Most of what exists is XRF screening by advocacy testers, which reads elements at the surface of a part, is not an accredited laboratory report and does not measure particles or migration, so it can't move a product to a higher tier.
What doesn't count. A body material on the label does not describe the product, and neither does "BPA-free", "100% silicone" or "medical-grade". A manufacturer's testing summary without a report is a claim, not independent testing. A certification counts only for the item it lists. A recall of one product says nothing about another brand's product, and a lawsuit is an allegation and not a laboratory result.
Hazard, exposure and risk. We keep them apart. Particles detected or a substance that migrates under test conditions is not evidence that a product causes disease, and we say what a study measured and what it didn't.
Heat. We never suggest cooler formula water in place of pathogen control. The CDC's guidance for higher-risk babies comes first; see heat and formula preparation.
We apply these rules the same way to every product, and they don't change to fit a favorite. Price, affiliate links and retailer availability play no part in a verdict. Some products on this page have affiliate links, added only after the verdict, and a product with an Amazon link shows a relative price tier instead of a dollar price ($ is under $15 per unit, $$ is $15 to $24.99 and $$$ is $25 and up). See the full site-wide standard for how every category is held to the same process.
The short version
- Best overall: Pura Kiki 5 oz Infant Bottle
- The surprise finding: Lifefactory 9 oz Glass Baby Bottle: a glass bottle with the clearest parts list on this page, whose cap, ring and stopper are polypropylene: glass on the label is not the whole fluid path.
Find & compare baby bottles and sippy cups
Compare the evidence
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Matches your choices
Verdict: Leading design
Pura Kiki 5 oz Infant Bottle · $$
- Verdict
- Leading design
Pura states this bottle is single-wall 18/8 stainless steel with a silicone nipple, no solder, no paint and no plastic, the shortest fluid path we reviewed, though no independent report backs those statements.
- Good
- Pura states a stainless-and-silicone fluid path with no plastic and no paint
- Single-wall, so no insulated soldered base; Pura states its non-insulated bottles use no solder
- No glass to break
- Caution
- Construction and testing statements are Pura’s own; no independent teardown or lab report was found
- Pura’s historical lead-solder issue concerned insulated bottles; no independent test of a non-insulated Pura bottle was found
Pura states no solder, no paint and no plastic. We found no independent teardown or lab report for this exact bottle.
Pura Kiki 9 oz Baby Bottle · $$$
- Verdict
- Leading design
The larger Kiki has the same stainless-and-silicone construction and the same manufacturer-only evidence as the 5 oz, for babies from 3 months.
- Good
- Same short stainless-and-silicone fluid path as the 5 oz, in a larger size
- Pura states compatibility with most standard warmers and sterilizers
- Silicone tops are interchangeable across Pura’s line
- Caution
- Construction and testing statements are Pura’s own; no independent teardown or lab report was found
- Pura’s historical lead-solder issue concerned insulated bottles; no independent test of a non-insulated Pura bottle was found
Same limits as the 5 oz: no solder, paint and plastic are the manufacturer's statements, with no independent teardown or lab report found.
Lifefactory 9 oz Glass Baby Bottle · $$
- Verdict
- Leading design
A borosilicate glass bottle with the most explicit parts list of the glass products we reviewed, but its cap, ring and stopper are polypropylene, so it is a glass bottle and not a plastic-free system.
- Good
- Names each part: borosilicate glass, silicone sleeve and nipple, polypropylene cap, ring and stopper
- Simple geometry with no internal vent or valve listed
- Clear glass makes residue easy to see
- Caution
- The cap, ring and stopper are polypropylene, so this is not a plastic-free system
- No laboratory report for this SKU; two informal XRF screens of the line differ, and “tested to meet FDA standards” has no published test
Philips Avent Glass Natural Response Baby Bottle
- Verdict
- Leading design
A borosilicate glass bottle with a silicone nipple and a polypropylene screw ring from a widely available line, with the exact model and its BPS statement still to confirm.
- Good
- Borosilicate glass body with a silicone nipple
- Philips describes its materials by part type on a support page
- Fewer internal pieces than vented systems when used without an accessory vent
- Caution
- The screw ring is polypropylene, so the system is not plastic-free
- Materials come from a family-level page, and Philips’s BPS statement does not list this model
- A consumer case about microplastic disclosure closed in 2025 by stipulated dismissal; that is legal history, not a test result
Materials come from a family-level Philips page, the model page shows no price, and Philips's BPS statement did not list this model. Confirm the current SKU and generation.
Pura Kiki 11 oz Kiddo Straw Bottle · $$$
- Verdict
- Leading design
A straw bottle Pura states is stainless steel and silicone with no paint, no plastic and no solder, with a straw that needs a brush and thorough drying.
- Good
- A stainless-and-silicone fluid path with no valve listed
- Single-wall body avoids an insulated soldered base
- The straw is removable and replaceable
- Caution
- Construction and testing statements are Pura’s own; no independent report was found
- The straw is a narrow passage that needs a brush and thorough drying, and the page gives no cleaning steps
Pura states no solder, no paint and no plastic contact. We found no independent teardown or lab report for this exact bottle.
Pura Kiki 11 oz Sippy Bottle · $$$
- Verdict
- Leading design
A spout bottle Pura states is stainless steel and silicone with no paint and no plastic, a fair choice for families who want a spout, since a sippy stage is optional.
- Good
- A stainless-and-silicone fluid path
- Single-wall body avoids an insulated soldered base
- A replaceable spout
- Caution
- Whether the spout holds a valve, and how to clean it, is not stated; the AAP advises choosing a sippy cup with no valve
- Construction and testing statements are Pura’s own; no independent report was found
Pura states no solder, no paint and no plastic. Spout construction and cleaning steps are not described, and no independent report was found.
ezpz Mini Cup + Straw Training System · $$
- Verdict
- Leading design
An all-silicone open-cup and straw training set with visible surfaces and no valve listed, though “100% silicone” is the maker’s claim and no exact-product laboratory data was found.
- Good
- Three pieces, no valve listed and largely visible surfaces
- Open-cup and straw use in one set
- No rigid plastic body
- Caution
- Material and testing statements are ezpz’s own; no report was found
- Silicone is not perfectly inert, and generic studies did not test this cup
Material and testing statements are the manufacturer's, and its page could not be fully re-read on 2026-09-30. No independent report was found.
Verdict: Trade-offs
Dr. Brown's Natural Flow Anti-Colic Options+ Glass Narrow Bottle, 4 oz · $
- Verdict
- Trade-offs
A glass bottle with a purpose-built anti-colic vent that adds polypropylene and thermoplastic-rubber parts and narrow passages to clean, best for families who specifically want that vent.
- Caution
- The internal vent adds polypropylene and thermoplastic-rubber parts to the liquid’s path
- The narrow vent tube must be brushed by hand, and this SKU’s exact parts are unconfirmed
- Good
- Glass bottle body with a silicone nipple
- Care instructions explicitly cover boiling, sterilizers and the dishwasher top rack
- Consumer Reports reports no BPA, lead or phthalates in its Options+ glass bottle (size not stated)
Materials come from a family-level Dr. Brown's page; regional and support pages differ. Archive the current U.S. packaging or manual to confirm this SKU.
Dr. Brown's Anti-Colic Options+ Wide-Neck Glass Bottle, 5 oz · $
- Verdict
- Trade-offs
The wide-neck version of the same vented glass system, with the same extra polymer parts and hand-cleaning steps.
- Caution
- The same extra polypropylene and thermoplastic-rubber vent parts and narrow tube to brush
- This SKU’s exact parts are unconfirmed
- Good
- Glass body with a wider opening for the bottle itself
- Care instructions cover boiling, sterilizers and the dishwasher top rack
- The same mature vent design as the 4 oz bottle
Materials come from a family-level Dr. Brown's page; regional and support pages differ. Archive the current U.S. packaging or manual to confirm this SKU.
Hegen PPSU Baby Bottle, 5 oz / 150 mL · $$
- Verdict
- Trade-offs
A light, shatter-resistant PPSU bottle with a silicone nipple, but the body is a polymer, generic studies found particle release from PPSU bottles, and no Hegen-specific test was found.
- Caution
- A polymer body: a 2025 study is recorded as reporting particle release from tested PPSU bottles
- Collar and lid materials are not stated part by part, and no Hegen-specific test was found
- Good
- Light, shatter resistant and high-heat
- A 2018 study of PPSU baby bottles found migration within its tested limits
- No glass to break
The collar and lid materials are not stated part by part (Hegen names PP parts and silicone components), and no exact-Hegen particle or migration test was found. Generic PPSU studies are background only.
Comotomo Gen 2 Baby Bottle, 5 oz · $
- Verdict
- Trade-offs
A soft silicone-body bottle with a wide neck, but BASF says its ring is PPSU, the Gen 2 cap and nipple materials are not stated, and the independent screens tested the earlier Natural Feel bottle.
- Caution
- BASF says the ring is PPSU; Comotomo’s US page does not state the ring, cap or nipple materials
- The independent screens tested the earlier Natural Feel bottle, and generic silicone studies did not test this bottle
- Good
- A soft silicone body avoids a rigid polypropylene body
- Wide neck and a short component list
- States that boiling, sterilizers and the dishwasher top rack are all fine
The PPSU ring comes from a BASF news release and not from Comotomo’s US page, the Gen 2 cap and nipple materials are not stated, and the independent screens tested the earlier Natural Feel bottle. Older-generation facts are not applied to Gen 2.
Munchkin Miracle 360° Trainer Cup, 7 oz · $
- Verdict
- Trade-offs
A three-part 360° cup whose manual says it is not for hot liquids or sterilizing, whose valve and o-ring have to be separated and dried, and whose component materials Munchkin does not state.
- Caution
- The valve and an o-ring must be separated and dried; the manual says not to use the cup with hot liquids or to sterilize it
- The AAP advises choosing a sippy cup with no valve, and component materials are not stated
- Good
- Three parts, all of which separate
- A 360° rim without a projecting spout
- A low list price
No component materials are stated on Munchkin’s page or in its manual, the cup is not designed for hot liquids or sterilizing, and consumer complaints about mold are not a CPSC recall.
Evenflo Feeding Balance+ Wide Neck Glass Bottle, 6 oz · $
- Verdict
- Trade-offs
A wide-neck glass bottle with a silicone nipple and four parts, but the ring, cap and integrated vent materials are not stated, so Trade-offs is our estimate until they are.
- Caution
- The ring, cap and vent materials are not stated, so the fluid path is incomplete
- No independent testing of the glass bottle was found
- Good
- A glass body with a silicone nipple
- Four parts and a wide neck
- About $10 per bottle in the 3-pack
Ring, cap and integrated vent materials are not stated on Evenflo's page, so the fluid path is incomplete.
Could match; check these details
Why other products were excluded
What actually touches the liquid
The body is only one part
A bottle or cup is a system. Milk, formula or water can touch the body, the nipple, spout or straw, the collar or screw ring, the valve or vent, gaskets and seals, an internal reservoir tube, and any coating, paint or joint. We record every one of them for every product and ask the same question of each: does this touch the liquid?
That is why we don't sort this category into "glass good, plastic bad". A glass bottle can still have a polypropylene ring. A stainless cup can still hide a solder joint. A silicone bottle can still release measurable siloxanes or particles under laboratory conditions. And an acceptable material becomes a poor product when its valve traps liquid that can't be seen or dried.
What we can and can't say
We report what a maker states, what a regulator found, what a peer-reviewed study measured and what remains unknown, and we keep those apart. For every product on this page, exact-product laboratory data does not exist in the sources we reviewed, and each product page says so.
Every fluid path side by side
Pura Kiki 5 oz Infant Bottle
- Bottle body: 18/8 stainless steel, single-wall (touches the liquid; manufacturer states)
- Nipple (Natural Vent): Medical-grade, platinum-cured silicone (touches the liquid; manufacturer states)
- Collar: Stainless steel and silicone construction (Pura's wording) (contact not stated; manufacturer states)
Base and solder: No solder: manufacturer states
Verification: Construction verification partial; no independent exact-product test found.
Pura Kiki 9 oz Baby Bottle
- Bottle body: 18/8 stainless steel, single-wall (touches the liquid; manufacturer states)
- Nipple (Natural Vent): 100% medical-grade, platinum-cured silicone (touches the liquid; manufacturer states)
- Collar: Stainless steel and silicone construction (Pura's wording) (contact not stated; manufacturer states)
Base and solder: No solder: manufacturer states
Verification: Construction verification partial; no independent exact-product test found.
Lifefactory 9 oz Glass Baby Bottle
- Bottle body: Borosilicate glass (touches the liquid; manufacturer states)
- Nipple (Stage 2): Silicone (touches the liquid; manufacturer states)
- Ring: Polypropylene (touches the liquid; manufacturer states)
- Stopper: Polypropylene (contact not stated; manufacturer states)
- Cap: Polypropylene (contact not stated; manufacturer states)
- Cap gasket: Silicone (Lifefactory’s FAQ says caps contain polypropylene with a silicone gasket) (contact not stated; manufacturer states)
Verification: Component list is explicit; no independent exact-product test found.
Philips Avent Glass Natural Response Baby Bottle
- Bottle body: Borosilicate glass (touches the liquid; manufacturer family-level page)
- Nipple: Silicone (touches the liquid; manufacturer family-level page)
- Screw ring: Polypropylene (touches the liquid; manufacturer family-level page)
- AirFree vent (only if fitted; not part of this SKU as listed): PBT and silicone (LSR) (touches the liquid; manufacturer family-level page)
Verification: Exact model check needed. Construction verification partial; no independent exact-product test found.
Dr. Brown's Natural Flow Anti-Colic Options+ Glass Narrow Bottle, 4 oz
- Bottle body: Glass (touches the liquid; manufacturer states)
- Nipple (Level 1): Silicone (touches the liquid; manufacturer states)
- Collar: Polypropylene (family-level statement) (touches the liquid; manufacturer family-level page)
- Vent insert: Santoprene thermoplastic rubber (family-level statement) (touches the liquid; manufacturer family-level page)
- Reservoir tube: Transparent polypropylene (family-level statement) (touches the liquid; manufacturer family-level page)
Verification: Construction verification required; no independent exact-product test found.
Dr. Brown's Anti-Colic Options+ Wide-Neck Glass Bottle, 5 oz
- Bottle body: Glass (touches the liquid; manufacturer states)
- Nipple (Level 1): Silicone (touches the liquid; manufacturer states)
- Collar: Polypropylene (family-level statement) (touches the liquid; manufacturer family-level page)
- Vent insert: Santoprene thermoplastic rubber (family-level statement) (touches the liquid; manufacturer family-level page)
- Reservoir tube: Transparent polypropylene (family-level statement) (touches the liquid; manufacturer family-level page)
Verification: Construction verification required; no independent exact-product test found.
Hegen PPSU Baby Bottle, 5 oz / 150 mL
- Bottle body: PPSU (touches the liquid; manufacturer states)
- Nipple: Soft silicone (touches the liquid; manufacturer states)
- Collar and lids: Polypropylene or silicone (Hegen’s care pages list “PP parts” and “silicone components”; which part is which is not stated) (contact not stated; not stated: verification required)
Verification: Construction verification required; no independent exact-product test found.
Comotomo Gen 2 Baby Bottle, 5 oz
- Bottle body: Food-grade silicone (“skin-like silicone”) (touches the liquid; manufacturer states)
- Over-molded ring: Polyphenylsulfone (PPSU), BASF Ultrason P 2010, per BASF’s June 2026 news release about Comotomo’s next-generation bottle; Comotomo’s own US page does not state it, and BASF does not use the label “Gen 2” (contact not stated; material supplier’s release, not the brand’s page)
- Nipple: Not stated on the Gen 2 page (the earlier Natural Feel listing says silicone, which is not applied here) (touches the liquid; not stated: verification required)
- Cap: Not stated on the Gen 2 page (the earlier Natural Feel listing says polypropylene, which is not applied here) (contact not stated; not stated: verification required)
- Dual vents: Built into the silicone body (touches the liquid; manufacturer states)
Verification: Exact model check needed. Construction verification required; no independent exact-product test found.
Pura Kiki 11 oz Kiddo Straw Bottle
- Body: 18/8 stainless steel, single-wall (touches the liquid; manufacturer states)
- Straw: 100% medical-grade, platinum-cured silicone (touches the liquid; manufacturer states)
- Collar or lid: Stainless steel and silicone construction (Pura's wording) (touches the liquid; manufacturer states)
Base and solder: No solder: manufacturer states
Verification: Construction verification partial; no independent exact-product test found.
Pura Kiki 11 oz Sippy Bottle
- Body: 18/8 stainless steel, single-wall (touches the liquid; manufacturer states)
- Sippy spout: 100% medical-grade, platinum-cured silicone (touches the liquid; manufacturer states)
- Collar: Stainless steel and silicone construction (Pura's wording) (touches the liquid; manufacturer states)
Base and solder: No solder: manufacturer states
Verification: Construction verification partial; no independent exact-product test found.
ezpz Mini Cup + Straw Training System
- Cup: 100% food-grade silicone (manufacturer states) (touches the liquid; manufacturer states)
- Straw: Silicone (retailer listing; manufacturer says 100% silicone) (touches the liquid; manufacturer states)
- Lid: Silicone (retailer listing; manufacturer says 100% silicone) (contact not stated; manufacturer states)
Verification: Component list is explicit; no independent exact-product test found.
Munchkin Miracle 360° Trainer Cup, 7 oz
- Cup body: Plastic (polymer not stated by Munchkin) (touches the liquid; not stated: verification required)
- 360° valve: Not stated by Munchkin (the supplied dossier recorded silicone from an earlier reading of Munchkin’s page; the manual and current page do not say) (touches the liquid; not stated: verification required)
- Collar: Not stated (contact not stated; not stated: verification required)
- Clear o-ring on the collar threading: Not stated; the manual says to remove it for a deeper clean (contact not stated; not stated: verification required)
Verification: Construction verification required; no independent exact-product test found.
Evenflo Feeding Balance+ Wide Neck Glass Bottle, 6 oz
- Bottle body: Thermal-shock-resistant glass (touches the liquid; manufacturer states)
- Nipple: 100% soft silicone; Evenflo’s support page says Balance+ flanges are latex-free 100% food grade silicone (touches the liquid; manufacturer states)
- Ring or collar: Not stated (contact not stated; not stated: verification required)
- Cap: Not stated ('spill-proof cap') (contact not stated; not stated: verification required)
- Vent: Not stated ('1-piece integrated venting system') (touches the liquid; not stated: verification required)
Verification: Construction verification required; no independent exact-product test found.
Materials: what the evidence says
Each material solves one problem and leaves another open. These cards state what the evidence supports and what it doesn’t, with the source for each statement.
Polypropylene (PP, resin code 5)
Cheap, light and durable, with the strongest infant-bottle-specific evidence of heat-linked particle release.
Advantages
- Lightweight and shatter resistant
- Widely used for bottle bodies, rings, caps and vent parts
- Low cost
Trade-offs
- Laboratory work found microplastic release under hot preparation and sterilization
- Many glass and stainless systems still use PP for rings, caps or vents
What the evidence says
- Independent study A 2020 Nature Food study of polypropylene infant bottles measured microplastic release as high as 16,200,000 particles per litre, with sterilization and high-temperature water significantly increasing it, and modelled infant intake of 14,600 to 4,550,000 particles per person per day across 48 regions. It measured particle release and modelled intake, not illness. Li D et al., Nature Food (2020)
What is not known
- The health significance of infant ingestion at the measured levels has not been established.
- How current named U.S. bottles compare under identical use is not known.
- Nanoplastic release below older methods' detection ability is not characterized.
How we word it: Laboratory studies have measured temperature-dependent microplastic release from polypropylene infant feeding bottles. The clinical significance of infant ingestion at these levels remains uncertain.
Borosilicate glass
No bulk-polymer bottle body, but the whole system usually still has polypropylene and silicone parts.
Advantages
- No polymer bottle body
- Strong chemical resistance
- Transparent, so residue is easy to see
Trade-offs
- Heavier and breakable
- Rings, caps, stoppers and vents are often polypropylene
- A glass body does not make a system plastic-free
What the evidence says
- Independent study The glass body avoids the polypropylene-body shedding mechanism measured in the 2020 study. That study did not test glass bottles, and a body material cannot describe rings, caps or vents. Li D et al., Nature Food (2020)
What is not known
- No exact-product migration or particle data was found for the glass systems on this page.
How we word it: A glass bottle is a strong body choice, but read the rest of the fluid path before assuming a glass system has no plastic in it.
Stainless steel
Durable with no polymer body, but solder and base construction decide whether a cup is a problem.
Advantages
- Shatter resistant and durable
- No bulk-polymer body
- Single-wall designs can avoid solder
Trade-offs
- The grade alone does not answer the construction question
- Insulated designs often join walls or seal bases with solder
- Opaque, so the interior is harder to inspect
What the evidence says
- Regulatory CPSC has recalled several children's stainless cups because an accessible solder bead or a base that could detach exposed lead-containing solder. These recalls concern specific products and do not show that stainless cups in general contain lead. U.S. Consumer Product Safety Commission
- Regulatory CPSC's notices for PandaEar, LAOION, Tiblue and Klickpick Home describe an accessible solder bead on the bottom exterior containing lead above the federal limit, and CUPKIN's notice does not say which component held the lead. Each names specific products. U.S. Consumer Product Safety Commission
What is not known
- Exact-product metal-migration data for stainless infant feeding systems was not found.
- The research dossier notes that nickel and chromium can migrate from stainless steel under aggressive conditions such as acidic or salty foods and long contact. It does not cite that to a source we could re-check here, and it has not been shown to apply to short-term milk or water use.
How we word it: Prefer single-wall stainless with no solder, no interior coating and no painted surface where liquid can reach, and treat the no-solder point as a construction fact to verify.
PPSU (polyphenylsulfone)
High heat resistance and shatter resistance, but still a polymer with documented particle release in a generic study.
Advantages
- High heat resistance
- Light and shatter resistant
- Dimensionally stable
Trade-offs
- It is a polymer: a 2025 feeding-bottle study reported particle release that rose with temperature
- PPSU is formally composed of bisphenol S and 4,4′-dihydroxybiphenyl, so its chemistry is not unrelated to bisphenols
- Exact-SKU testing is usually missing
What the evidence says
- Independent study A 2018 study of five PPSU baby-bottle types did not detect BPS above 0.3 mg/kg of polymer, found DHBP at 1.7 to 15.5 mg/kg, and found migration into a milk simulant that exceeded neither specific migration limits nor thresholds. That is reassuring inside those conditions and is not a statement about every current bottle. Eckardt M, Greb A, Simat TJ, Food Additives & Contaminants: Part A (2018)
- Independent study A 2025 Food Control study of infant feeding bottles and milk storage bags is recorded in our research as reporting particle release from tested PPSU bottles that rose with temperature, with products bought in China. We could not retrieve the abstract to re-verify that, and its products cannot be assigned to a named US SKU. Zhao L et al., Food Control 168 (2025)
What is not known
- Exact-product particle or migration results for the Hegen bottle were not found.
How we word it: PPSU is a reasonable lightweight, high-heat, shatter-resistant option. It is a polymer, so it is not particle-free and not a way around the whole-system questions.
Silicone
Soft and heat resistant and often the best nipple or spout material, but not perfectly inert.
Advantages
- Soft and flexible
- Heat resistant
- Useful for nipples, straws, spouts, seals and some bottle bodies
Trade-offs
- A 2026 study measured siloxane migration from 30 silicone food-contact products sold in China
- A 2025 study reported particle release from tested silicone feeding bottles
- '100% silicone' does not mean zero migration
What the evidence says
- Independent study A 2026 study of 35 siloxanes migrating from 30 silicone food-contact products into food simulants under worst-case conditions found cyclic siloxanes above proposed limits in several samples, and 14 low-molecular-weight siloxanes above the threshold of toxicological concern in its modelled scenarios, while D4 and D5 showed negligible risk. The products were not the ones on this page, the exposure figures are modelled, and it was not a clinical infant study. Chen Y et al., Foods (MDPI) 15(8):1387 (2026)
- Independent study The 2025 Food Control study is recorded in our research as reporting particle release from tested silicone feeding bottles that rose with temperature; that summary was not re-verified against the paper. Zhao L et al., Food Control 168 (2025)
What is not known
- Exact-product siloxane or particle data for the silicone products on this page was not found.
- Clinical significance is unknown.
How we word it: Silicone is practical and often preferred for nipples and soft interfaces. Findings on generic silicone are background and do not establish exposure or harm from any one product.
Natural rubber (latex) nipples
Softer than silicone but wears faster, can sensitize, and has a specific FDA nitrosamine guidance.
Advantages
- Very soft and flexible
Trade-offs
- Degrades faster than silicone
- Natural-rubber allergy or sensitization is possible
- FDA guidance addresses volatile N-nitrosamines released from rubber nipples
What the evidence says
- Regulatory FDA guidance sets an action level of 10 ppb for each individual volatile N-nitrosamine in rubber baby-bottle nipples. U.S. Food and Drug Administration
What is not known
- None of the products on this page uses a latex nipple, so no product verdict turns on this.
How we word it: Silicone is the simpler default nipple material. See the latex glossary entry for allergy context.
Tritan (copolyester)
Lower-confidence material: the estrogenic-activity dispute has conflicts of interest on both sides, and no Tritan product is reviewed here.
Advantages
- Clear and tough
Trade-offs
- A legal finding about false commercial advertising is not a scientific finding that a material can never show biological activity
- Older assay disputes cannot be mapped onto a modern product without checking its exact formulation
What the evidence says
- Independent study A 2011 peer-reviewed study (Yang and colleagues, with authors from CertiChem and PlastiPure) reported estrogenic activity in most tested plastic products, including some sold as BPA-free. Its authors had commercial interests. Yang et al., Environmental Health Perspectives (2011)
- Retailer or secondary Reuters reported that both the original study and the industry-funded rebuttal work carried conflicts of interest and disclosure problems. Reuters (secondary reporting)
- Legal history A Fifth Circuit opinion in the Eastman case concerned false commercial advertising. It is not a scientific finding that a material can never show biological activity. U.S. Court of Appeals for the Fifth Circuit, via Justia
What is not known
- Infant-bottle-specific migration and particle data for Tritan is less direct than for polypropylene.
How we word it: Tritan gets neither a safe nor an unsafe label here; no Tritan product has been reconciled to an exact current U.S. SKU.
Heat, sterilizing and formula preparation
What the CDC says
The CDC says very hot water, about 158°F (70°C), is needed to kill germs when a baby is younger than 2 months, was born prematurely or has a weakened immune system. For other babies, standard preparation follows the formula maker's instructions. The CDC also says never to use a microwave, which heats unevenly and leaves hot spots, and that bottles need to be clean and sanitized.
Heat and particles
Laboratory studies found more particle release from polypropylene, PPSU and silicone bottles at higher temperatures. That is a reason to prefer a fluid path with less polymer where it is practical. It is never a reason to use cooler water for a baby who needs hot water: pathogen control for higher-risk infants comes first. Ask your pediatrician about your own baby.
Care instructions we record
Each product page lists what its maker says about boiling, sterilizers, the dishwasher and the microwave, and says "not stated" when the maker doesn't say. They differ more than you might expect. Lifefactory, Dr. Brown's, Evenflo, Hegen and Pura say their bottles can be boiled, while Munchkin's manual says its cup must not be boiled, sterilized, microwaved or used with hot liquids, so a family that sterilizes cups or fills them from hot water should read that line. A maker's statement that a bottle is microwave safe is a product-care claim and not advice to heat a feed. Pura tells parents never to give a child liquid above 99°F (37°C), and Dr. Brown's says to remove the vent system before warming or shaking a bottle.
Cleanability is a safety criterion
A cup or bottle you can't see into, take apart and dry is a different product from one you can. In 2016 CPSC recalled about 3.1 million Tommee Tippee cups because mold could grow on an opaque, removable, one-piece valve. The agency received 3,066 reports of mold and 68 reports of children with diarrhea, vomiting or related symptoms. That is a design failure, not a chemistry result.
For each product we record what the maker says about the number of parts, whether the liquid path can be seen, whether there is a vent, valve or straw that needs a brush, whether it can dry completely, and whether replacement parts exist. We show those facts as they are, say "not stated" where they are, and do not roll them into a score. A vent, a valve and a straw are the places to look first.
Stainless steel, solder and base construction
Steel grade is not the whole story
Stainless steel gives a durable body with no bulk-polymer shell. What matters for a child's cup is how the parts are joined. CPSC has recalled several stainless children's cups since 2022: Green Sprouts, whose base could break off and expose a lead-containing solder dot, and CUPKIN, LAOION, PandaEar, Tiblue and Klickpick Home, whose cups contained lead above the federal lead content ban. In four of those five, CPSC named an accessible solder bead on the bottom. Each recall names specific products, and none shows that stainless cups in general contain lead.
What we record
Every stainless product has a base and solder construction field with one of these states: no solder (manufacturer states), no solder (independently verified), lead-free solder (manufacturer states), solder present with composition independently verified, solder present with composition unknown, unknown, or not applicable. We never turn a manufacturer's statement into an independent verification.
Pura states that its standard non-insulated bottles use no solder, that it has used certified lead-free solder in insulated bottles since 2017, and that some insulated bottles made before 2017 could have a solder material containing lead. We found no independent teardown or laboratory report for its non-insulated bottles, so their no-solder status is recorded as a manufacturer statement.
Recalls, and what each one covers
Every recall here is tied to the exact products the CPSC named. A recall of one brand’s cup says nothing about another brand’s, and none of the 13 products reviewed on this page has an open recall that we found.
- Pura Stainless: No bottle or cup recall. The only Pura recall found is a fragrance diffuser unrelated to bottles.
- Lifefactory: No recall found.
- Philips Avent: No bottle recall. The Avent recall found concerns digital video baby monitors (2023).
- Dr. Brown’s (Handi-Craft): No bottle or cup recall. Recalls found concern Lovey pacifier holders (2018), bottle and dish soap (2017) and toys (1992).
- Hegen: No recall found.
- Comotomo: No recall found.
- ezpz: No recall found.
- Munchkin: No cup or bottle recall. The recalls found concern pacifiers (1995) and shoes (2001).
- Evenflo: No bottle recall. Its recalls concern other juvenile products.
TOMY International (Boon)
Choking or mechanical failure
- Exact products
- Boon NURSH 8 oz Reusable Baby Bottles 3-pack, pink tie dye, item B11654, UPC 669028116546, sold at Walmart November 2025 to May 2026
- Hazard
- The hard plastic outer shell can bubble or partly peel into film-like pieces that are a choking hazard.
- Reports
- 135 reports of bubbling or peeling; no injuries reported.
- Remedy
- A $22 Boon store credit or a replacement three-bottle set in a different color.
- Applies to
- Only that one pink tie dye 8 oz 3-pack, item B11654, UPC 669028116546.
- Does not apply to
- Other Boon NURSH colors, sizes or packs. The notice does not name any as recalled.
- What it teaches
- Peeling layers on a multi-part shell are a mechanical failure to check for.
Igloo Products
Choking or mechanical failure
- Exact products
- Igloo 12 oz Youth Sipper Bottles in the listed color combinations
- Hazard
- The silicone cover on the sipper can detach while in use, a choking hazard.
- Reports
- One incident reported; no injuries.
- Remedy
- Refund, replacement or store credit; details on the CPSC notice.
- Applies to
- The listed Igloo youth sipper bottles.
- Does not apply to
- Any other brand's silicone spout or cover.
- What it teaches
- A detachable part is a mechanical hazard on its own, whatever the chemistry.
FENGM (Tiblue)
Lead in accessible solder
- Exact products
- Tiblue 8 oz and 12 oz double-walled stainless steel children's cups, sold on Amazon August 2021 to July 2023
- Hazard
- An accessible solder bead on the exterior bottom contains lead above the federal limit; lids can crack.
- Reports
- No incidents or injuries reported.
- Remedy
- CPSC urges consumers to dispose of the cups; the firm has not cooperated with the recall.
- Applies to
- The listed Tiblue cups.
- Does not apply to
- Other brands or stainless cups in general.
- What it teaches
- An exposed solder joint on the base is the failure to look for.
Klickpick Home
Lead in accessible solder
- Exact products
- Klickpick Home stainless steel children's cup sets, 8 oz and 12 oz, with silicone straws and lids
- Hazard
- An accessible solder bead contains lead above the federal limit; lids can fracture into sharp edges and small pieces.
- Reports
- No incidents or injuries reported.
- Remedy
- Full refund.
- Applies to
- The listed Klickpick Home cup sets.
- Does not apply to
- Other brands or stainless cups in general.
- What it teaches
- An exposed solder joint on the base is the failure to look for.
PandaEar
Lead in accessible solder
- Exact products
- PandaEar stainless steel toddler cups, 8 oz, sets of two with silicone straws
- Hazard
- An accessible solder bead on the bottom exterior contains lead above the federal limit; lids can fracture into sharp or small pieces.
- Reports
- No incidents or injuries reported.
- Remedy
- Full refund.
- Applies to
- The listed PandaEar cups.
- Does not apply to
- Other brands or stainless cups in general.
- What it teaches
- An exposed solder joint on the base is the failure to look for.
LAOION
Lead in accessible solder
- Exact products
- LAOION children's cups, 8 oz, sold on Amazon March to May 2023
- Hazard
- An accessible solder bead contains lead above the federal limit; lids can crack and leave sharp edges and small pieces.
- Reports
- No incidents or injuries reported.
- Remedy
- Full refund.
- Applies to
- The listed LAOION cups.
- Does not apply to
- Other brands or stainless cups in general.
- What it teaches
- An exposed solder joint on the base is the failure to look for.
Soojimus (CUPKIN)
Lead content
- Exact products
- CUPKIN double-walled stainless steel children's cups, 8 oz and 12 oz, sold January 2018 to March 2023
- Hazard
- The cups contained lead above the federal lead content ban. The notice does not say which component held the lead.
- Reports
- No incidents or injuries reported.
- Remedy
- Full refund.
- Applies to
- The listed CUPKIN cups.
- Does not apply to
- Other brands or stainless cups in general.
- What it teaches
- A lead violation can sit in a construction detail, and the notice here does not identify it.
Green Sprouts
Lead in accessible solder
- Exact products
- Green Sprouts Stainless Steel Sippy Cups (6 oz), Sip & Straw Cups (6 oz) and Straw Bottles (8 oz), sold January 2020 to September 2022
- Hazard
- The bottom base can break off and expose a solder dot that contains lead.
- Reports
- Seven reports of base breakage; no injuries reported.
- Remedy
- Refund; consumers keep the plastic and silicone parts and discard the base.
- Applies to
- The listed Green Sprouts stainless cups and bottles.
- Does not apply to
- Other brands, and single-wall stainless products that use no solder.
- What it teaches
- Base and joint construction matters as much as steel grade.
Mayborn USA (Tommee Tippee)
Mold and cleanability
- Exact products
- Tommee Tippee First Sips Transition cup, Trainer Sippee cup, Sippee cup (including Cute Quips), Sportee bottle and insulated Swiggle/Sipper tumblers with a removable, one-piece white valve, sold December 2014 to May 2016
- Hazard
- Mold could develop on the removable, one-piece, opaque valve when it was inadequately cleaned.
- Reports
- 3,066 reports of mold in the valve and 68 reports of children with diarrhea, vomiting or related symptoms after drinking from the cups.
- Remedy
- Free replacement cups.
- Applies to
- The listed Tommee Tippee cups and bottles that have the removable one-piece white valve.
- Does not apply to
- Any other brand's cup, including Munchkin Miracle 360, and Tommee Tippee products without that valve.
- What it teaches
- An opaque valve that holds moisture can grow mold. Visibility, complete disassembly and drying are safety criteria for a cup, not only conveniences.
Straw, spout, open and 360° cups
Open, straw and spout cups
The American Academy of Pediatrics recognizes open cups, straw cups and spouted (sippy) cups, and calls the sippy cup an optional step and not a required stage. It advises that anyone who prefers a sippy cup choose one with no valve, because many sippy cups have a valve under the spout that makes a child suck as from a bottle. That is guidance and not the result of a trial. We did not find a controlled head-to-head study showing that spout, straw, valve or 360° design changes speech, jaw, orthodontic or oral-motor outcomes, and we make no such claim in either direction.
Why we lean toward simple designs
We generally favor a simple open or straw cup when it is practical, because it can mean fewer components and fewer hidden valves. That is a design preference, and it happens to sit alongside the AAP's advice about valves; it is not a claim that a trial has shown a better developmental outcome. Where a family does want a spout or a 360° rim, we look at the same things: what touches the liquid, whether every wet part can be seen, separated and dried, and whether small parts can come off. The Munchkin Miracle 360 is drunk through a valve, and Pura does not say whether its sippy spout has one.
What matters more than the cup
For teeth, how often and how long a child sips milk or sugary drinks matters more than the cup's shape.
Kinds of evidence, and how much each one counts
Not all evidence weighs the same. Every fact on a product page is labelled with the kind of source it comes from.
Regulatory
A government regulator or authoritative public-health guidance (CPSC, FDA, CDC, California DTSC, European Commission).
Independent study
A peer-reviewed study. Unless the record says otherwise it tested generic products, not the exact product on this page.
Independent test
A test by a consumer-testing organization or independent tester, not peer-reviewed. Methods, detection limits and the model tested vary, and results usually cover a product line or an unspecified model.
Certification
A certification body's own listing. The scope is the listed item only, and it is not proof of anything the programme does not test.
Manufacturer disclosure
What the maker states about materials, construction or testing. A testing summary without the underlying report is a claim, not independent testing.
Legal history
Court filings and law-firm summaries of them. Allegations and pleading-stage rulings are not findings about product safety.
Retailer or secondary
Used only for availability or where no manufacturer page could be read, and always labelled.
Lawsuits are not test results
Two consumer lawsuits alleged that bottles we cover released microplastics. Both are closed, and neither is a finding about whether the bottles are safe.
In Miller v. Philips North America, a February 20, 2025 order in federal court in California rejected the theory that a "BPA Free" label was itself false, because it promised only that BPA was absent, and let a claim proceed that Philips failed to disclose microplastic release. The plaintiffs filed a second amended complaint in March, and on May 27, 2025 the parties filed a joint stipulation of dismissal, with prejudice as to the named plaintiffs and without prejudice as to the putative class. We did not find the terms of any settlement.
In Miller v. Handi-Craft, which involves Dr. Brown's, the court dismissed the false-advertising claims on April 29, 2025 because the plaintiffs had not shown that the microplastics released into warmed bottles were at unsafe levels; law-firm summaries cite it as Cortez v. Handi-Craft. On May 20, 2025 a plaintiff filed a notice of voluntary dismissal without prejudice. A dismissal without prejudice can be refiled, and we did not find a refiled case.
We confirmed the filing and closing dates from federal docket records and a litigation tracker on September 30, 2026, and read the Philips ruling from the court's order. We could not open the docket pages themselves, so entry-level detail comes from those secondary records.
Ingredient concerns for baby bottles and sippy cups
- Polypropylene (PP)Depends on contextThe study is evidence of exposure potential and not of harm, and the health significance of infant ingestion at those measured levels has not been established. We treat it as a reason to prefer a short fluid path with as little polypropylene as practical, not as a finding that any bottle is unsafe. It never overrides the CDC's hot-water guidance for babies under 2 months, born prematurely or with weakened immune systems.
- Silicone (siloxanes)Depends on contextNeither study tested a named US product or measured a health outcome, and the Foods exposure figures are modelled, so they show that migration and particle release are possible and not that any silicone product harms a baby. Silicone remains a practical and often preferred nipple and spout material, which is why we do not mark it down for being silicone. We do not accept "100% silicone" as proof of zero migration, and exact-product laboratory data for the silicone products we reviewed was not found.
- PPSU (polyphenylsulfone)Depends on contextThe 2018 result is reassuring inside its conditions but is not proof that every current PPSU bottle is the same, and, as our research records it, the 2025 products came from Chinese e-commerce channels and cannot be assigned to a named US bottle. We treat PPSU as a reasonable lightweight, high-heat option that is still a polymer: not inert, not particle-free, and not a reason to skip checking the rest of the fluid path.
- Microplastics and nanoplasticsDepends on contextParticles were measured under laboratory or use-simulation conditions, and the health significance of infant ingestion at those levels has not been established. We do not call any bottle microplastic-free, because no exact-product test covering the relevant particle sizes was found for any product we reviewed, and we do not call any bottle toxic on this evidence. Lawsuit allegations are allegations, not test results.
- Bisphenols (BPA, BPS, BPF)Use with caution"BPA-free" is true and narrow. It does not say anything about BPS or BPF, particles, siloxanes, metals, coatings, cleanability or the rest of the fluid path, and it is not a whole-product safety finding. Modern polypropylene and Tritan are not bisphenol-based, but PPSU is formally composed of bisphenol S and 4,4'-dihydroxybiphenyl, so BPS chemistry is not irrelevant to it. A 2018 study did not detect BPS above 0.3 mg/kg of polymer in five PPSU baby-bottle types.
- Lead (in solder and metal parts)Avoid entirelyThese recalls concern particular cups and do not show that stainless steel or stainless cups in general contain lead. They show that base and joint construction matters as much as the steel grade, so we record base and solder construction as its own field and say whether the evidence is a manufacturer's statement or an independent verification. For a cup that is under recall, CPSC's notices tell families to stop using it and take it away from children.
- PhthalatesUse with cautionThis lands in caution rather than outright avoid, because the worst-evidenced phthalates are already restricted in the products where children's exposure would matter most. Since Section 108 of the 2008 Consumer Product Safety Improvement Act and a 2017 CPSC final rule (16 CFR Part 1307), DEHP, DBP, BBP, DINP, DIBP, DPENP, DHEXP, and DCHP have been permanently banned above 0.1% (1,000 ppm) in any accessible part of U.S. children's toys and child care articles; the EU's REACH regulation (Annex XVII, Entry 51, expanded and in force since July 2020 via Commission Regulation (EU) 2018/2005) caps DEHP, DBP, BBP, and DIBP at 0.1% in essentially all plasticized consumer articles, Entry 52 separately restricts DINP/DIDP/DNOP in mouthable toys and childcare items, and the EU Cosmetics Regulation bans several phthalates from cosmetics outright. A toy, teether, or child-care item bought new from a mainstream U.S. or EU retailer today is very unlikely to contain these chemicals at meaningful levels, and the FDA states it currently has no evidence that phthalates as used in cosmetics pose a safety risk. The real remaining exposure comes from three places: older, secondhand, or cheaply imported vinyl products made before or outside these rules; personal-care and fragranced products where the "fragrance" label can legally hide undisclosed phthalates like DEP; and general indoor dust from vinyl building materials. For pregnant people and infants specifically, it's worth actively minimizing exposure to DEHP, DBP, and BBP given the anti-androgenic evidence, favor fragrance-free products and non-PVC household goods where that's an easy swap, but for the general population this is a "reduce where convenient, not a reason to panic over any single labeled product" chemical family rather than a hard no.
- Natural Rubber LatexDepends on contextFor the great majority of babies with no personal or family history of latex allergy, natural rubber latex in diaper elastic is not a meaningful worry: true Type I latex-protein allergy is uncommon in the general population, and sensitization typically builds up through repeated mucosal or medical exposure (surgical gloves, catheters, multiple procedures) rather than from occasional skin contact with a diaper's leg cuff. Notably, the documented cases of "diaper elastic" skin reactions in the dermatology literature, such as a 2020 Contact Dermatitis case report, trace back not to latex protein at all but to rubber-processing chemicals like mercaptobenzothiazole, producing a delayed Type IV allergic contact dermatitis; and both of these are still far rarer than ordinary diaper rash, which is overwhelmingly irritant contact dermatitis from prolonged urine/feces exposure and has nothing to do with elastic material. A true latex reaction in a diapered infant looks like localized contact urticaria, redness, itching, or hives right where the elastic touches skin, appearing within roughly 15 minutes and resolving after the diaper is removed, while systemic signs (widespread hives, swelling, wheezing, anaphylaxis) are rare with skin-only contact and are the ones that need urgent medical attention. For the minority who do carry real risk, a diagnosed latex allergy, latex-fruit syndrome, spina bifida, or a history of many early surgeries, avoiding natural rubber latex is medically sound, and a "latex-free" or "not made with natural rubber latex" diaper is a reasonable precaution, with the caveat that no label can guarantee zero trace protein. This is a genuine, well-characterized allergen worth flagging for the people it actually affects, not a reason for the average parent to treat every rash as a latex reaction.
Check your own product
Don't see your baby bottles and sippy cups on this page? Read its ingredient list against what we flag below. If you find one of these, here's what it means.
Ingredients and materials to look for
- Bisphenols (BPA, BPS, BPF)Use with caution
- Lead (in solder and metal parts)Avoid entirely
- PhthalatesUse with caution
Label phrases that signal a problem
- "BPA-free" is a narrow claim. It says nothing about BPS or BPF, particles, siloxanes, metals, coatings, cleanability or the rest of the fluid path.
- "Glass bottle" describes the body. Check the ring, cap, stopper and vent, which are often polypropylene.
- "Stainless steel" does not say how the base or seams are joined. Look for whether the maker states there is no solder, and whether that is a statement or an independent verification.
- "100% silicone" is a material description and not a claim of zero migration or zero particles.
- "Independently tested" or "third-party tested" without a named lab, report, method and detection limit is a manufacturer claim, not a test you can check.
- "Certified" applies to the item the certifier lists, which may be a nipple and not the whole bottle.
- "FDA compliant" or "meets FDA standards" describes food-contact materials rules, not an FDA test of the finished bottle.
Frequently asked questions
- Does a glass bottle mean no plastic?
- No. Glass describes the body only. The glass bottles here still have polypropylene parts in the ring, cap, stopper, collar or vent, and a silicone nipple. The question to ask is what touches the milk. See the fluid paths side by side.
- Are stainless steel baby cups safe?
- We can’t answer that for stainless steel in general, because the risk is in how a cup is built. CPSC has recalled several stainless children’s cups over lead in an accessible solder bead or a base that could detach, and each recall names specific products. We record whether each stainless product’s base is soldered and whether that is only the maker’s statement. See stainless steel, solder and base construction.
- Do plastic bottles release microplastics?
- Laboratory studies say some do under some conditions. A 2020 study measured particle release from polypropylene bottles that rose with temperature, and a 2025 study reported it from PPSU and silicone bottles. Those studies measured particles and not illness, and the health significance of infant ingestion at those levels has not been established.
- Has anyone independently tested these bottles?
- Some, but not the exact products. Consumer Reports found no BPA, lead or phthalates in a Dr. Brown's Options+ glass bottle, a Philips Avent Natural plastic bottle and a Comotomo Natural Feel bottle, without naming models or detection limits. Advocacy testers using handheld XRF screened Lifefactory, Avent glass and Dr. Brown's glass bottles and reported no detectable lead in most parts, trace cadmium in some silicone nipples, and a few low lead readings. Those are surface screens of a line, not accredited laboratory reports, they don't measure particles or migration, and the Comotomo results are for an earlier version. No product on this page has an independent laboratory report for its exact SKU.
- Is PPSU a safe alternative to polycarbonate?
- PPSU is not the BPA-based polycarbonate that was phased out of baby bottles. A 2018 study of five PPSU baby-bottle types did not detect BPS above 0.3 mg/kg of polymer and found migration within its tested limits, which is reassuring inside those conditions. PPSU is formally composed of bisphenol S and 4,4'-dihydroxybiphenyl, and our research records a 2025 study reporting particle release from PPSU bottles, though we could not re-read that abstract. It is a reasonable light, heat-resistant option that is still a polymer.
- Is silicone inert?
- No. A 2026 study of 30 silicone food-contact products sold in China measured siloxanes migrating into food simulants and modelled exposure, finding several above proposed limits. Our research also records a 2025 study reporting particle release from silicone feeding bottles. Neither tested the products on this page or measured harm. Silicone is still a practical nipple and spout material.
- What water temperature should I use for formula?
- Follow the formula maker’s instructions, and for babies younger than 2 months, born prematurely or with a weakened immune system, follow the CDC: very hot water, about 158°F (70°C), is needed to kill germs. Never microwave formula. We do not suggest cooler water to reduce particle release, and you should ask your pediatrician about your own baby.
- Does “BPA-free” mean a bottle has been shown safe?
- No. It says BPA was not used or found, and the 2012 FDA rule behind BPA baby bottles rested on industry abandoning the use. It does not address BPS or BPF, particles, siloxanes, metals, coatings, cleanability or the rest of the fluid path.
- Do I need a sippy cup, and is a straw cup better for speech?
- No. The American Academy of Pediatrics recognizes open, straw and spouted cups and treats a sippy cup as an optional step. It advises that anyone who chooses one pick a cup with no valve. We found no controlled trial showing that one shape is better for speech, jaw, teeth or oral-motor development. We lean toward simple designs because they can have fewer hidden valves, not because a trial favors them.
Sources
- Infant Formula Preparation and Storage, U.S. Centers for Disease Control and Prevention (2026)
- CPG Sec. 500.450 Volatile N-Nitrosamines in Rubber Baby Bottle Nipples, U.S. Food and Drug Administration (2005)
- Bisphenol A (BPA): Use in Food Contact Application, U.S. Food and Drug Administration (2023)
- Federal Register final rule, indirect food additives: adhesives and components of coatings (BPA in baby bottles and sippy cups), U.S. Food and Drug Administration / Federal Register (2012)
- Product Safety: Bisphenol of 2024 (SB 1266), California Department of Toxic Substances Control (2026)
- Food contact materials: legislation, European Commission (2026)
- Tommee Tippee Sippee Cups Recalled by Mayborn USA, U.S. Consumer Product Safety Commission (2016)
- Green Sprouts Recalls Toddlers' Stainless Steel Bottles and Cups Due to Lead Poisoning Hazard, U.S. Consumer Product Safety Commission (2022)
- Soojimus Recalls CUPKIN Stainless Steel Children's Cups Due to Violation of Federal Lead Content Ban, U.S. Consumer Product Safety Commission (2023)
- PandaEar Recalls Stainless Steel Children's Cups Due to Violation of Federal Lead Content Ban, U.S. Consumer Product Safety Commission (2023)
- Stainless Steel Children's Cups Recalled Due to Violation of Federal Lead Content Ban (LAOION), U.S. Consumer Product Safety Commission (2023)
- Tiblue Stainless Steel Children's Cups Recalled Due to Violation of Federal Lead Content Ban, U.S. Consumer Product Safety Commission (2023)
- Klickpick Home Recalls Stainless Steel Children's Cup Sets Due to Violation of Federal Lead Content Ban, U.S. Consumer Product Safety Commission (2023)
- Igloo Products Recalls Youth Sipper Bottles Due to Choking Hazard, U.S. Consumer Product Safety Commission (2024)
- TOMY Recalls Boon NURSH 8 oz Reusable Baby Bottles Due to Choking Hazard, Sold at Walmart, U.S. Consumer Product Safety Commission (2026)
- Microplastic release from the degradation of polypropylene feeding bottles during infant formula preparation, Li D et al., Nature Food (2020) (2020)
- Polyphenylsulfone (PPSU) for baby bottles: a comprehensive assessment on polymer-related non-intentionally added substances (NIAS), Eckardt M, Greb A, Simat TJ, Food Additives & Contaminants: Part A (2018) (2018)
- Microplastics release from infant feeding bottles and milk storage bags, Zhao L et al., Food Control 168 (2025) (2025)
- Migration of 35 Siloxanes from Silicone Food Contact Materials in China and Their Potential Exposure Assessment, Chen Y et al., Foods (MDPI) 15(8):1387 (2026) (2026)
- Discontinuing the Bottle, American Academy of Pediatrics / HealthyChildren.org (2023)
- Kiki 5oz Infant Bottle, Pura Stainless (2026)
- Kiki 9oz Baby Bottle, Pura Stainless (2026)
- Kiki 11oz Kiddo Straw Bottle, Pura Stainless (2026)
- Kiki 11oz Sippy Bottle, Pura Stainless (2026)
- A note about sustainability and safety from our founders, Pura Stainless (2026)
- Innovation and technology, Pura Stainless (2026)
- Pura Kiki Natural Vent Nipples, MADE SAFE (Made Safe Index) (2026)
- 9oz Glass Baby Bottle, Lifefactory (2026)
- What are the Philips Avent bottles and parts made of?, Philips (USA support) (2026)
- Is my Philips Avent product BPA and BPS free?, Philips (USA support) (2026)
- Philips Avent Glass Natural Response Baby Bottle SCY913/04, Philips (USA) (2026)
- Balance+ Bottles, Glass, Wide Neck, Evenflo Feeding (2026)
- Natural Flow Anti-Colic Options+ Glass Narrow Baby Bottle, 4 oz (SB41001), Dr. Brown's (2026)
- Anti-Colic Options+ Wide-Neck Glass Baby Bottle, 5 oz (WB51700), Dr. Brown's (2026)
- Tips, tricks and FAQs, Dr. Brown's (Handi-Craft) (2026)
- Hegen PPSU Anti-Colic Baby Bottle 150ml / 5oz, Hegen (2026)
- Comotomo Baby Bottle, Gen 2, Comotomo (2026)
- Silicone Mini Cup + Straw Training System, ezpz (2026)
- Miracle 360° Spoutless Sippy Cup (7 oz trainer size shown), Munchkin (2026)
- Pura Stainless MADE SAFE Certified Products, MADE SAFE (Made Safe Index) (2026)
- Miller v. Philips North America LLC (N.D. Cal.), as reported in law-firm summaries, Jenner & Block; Perkins Coie; Winston & Strawn (secondary summaries) (2025)
- Cortez v. Handi-Craft Co., 2025 WL 1452561 (N.D. Cal. Apr. 29, 2025), as reported in a law-firm update, Quinn Emanuel Urquhart & Sullivan (secondary summary) (2025)
- Most plastic products release estrogenic chemicals: a potential health problem that can be solved (Environmental Health Perspectives, 2011), Yang et al., Environmental Health Perspectives (2011) (2011)
- Science for hire: trial over plastic exposes disclosure deficit, Reuters (secondary reporting) (2013)
- Eastman Chemical Co. v. Plastipure (Fifth Circuit opinion), U.S. Court of Appeals for the Fifth Circuit, via Justia (2014)
- ezpz Mini Cup & Straw Training Set (retailer listing), Pottery Barn Kids (2026)
- Baby Bottles With No Detected BPA, Lead, or Phthalates, Consumer Reports (2025)
- Safest Baby Bottles Sans Lead & Microplastics, Mamavation with DetectLead (Eric Ritter) (2024)
- Baby Bottle Lead Database: 100+ Bottles XRF Tested, DetectLead (2026)
- #LeadFree: LifeFactory Baby Bottle, Lead Safe Mama (Tamara Rubin) (2017)
- #XRFTesting: Avent Glass Baby Bottle, Lead Safe Mama (Tamara Rubin) (2017)
- Philips Avent Natural Glass Baby Bottle: 21 ppm cadmium in the silicone nipple, safe by all standards, Lead Safe Mama (Tamara Rubin) (2022)
- Dr. Brown’s Natural Flow Glass Baby Bottle: lead-free, but trace cadmium found in the glass of the bottle and the nipple, Lead Safe Mama (Tamara Rubin) (2017)
- #Leaded: Made Safe Certified Pura Kiki Baby Bottle Purchased New in January of 2018, Lead Safe Mama (Tamara Rubin) (2018)
- Cleaning & Care, Pura Stainless (2026)
- Miracle 360° Trainer Cup, 7oz, Munchkin (2026)
- Instruction manual 44141, 7oz Miracle 360° Trainer Cup (CCD-0141-000 REV 4), Munchkin (2025)
- Baby Safety Alliance Verification, SGS for the Baby Safety Alliance (2026)
- Comotomo uses BASF’s PPSU as the base polymer in baby bottle ring component, BASF (material supplier) news release (2026)
- Comotomo Natural Feel Baby Bottle (retailer listing), Jillian’s Drawers (2026)
- Can I sterilize Hegen PPSU bottles?, Hegen (US help centre) (2026)
- Can Hegen PPSU bottles be microwaved?, Hegen (US help centre) (2026)
- Product Care & Usage, Hegen (global site) (2026)
- Frequently Asked Questions, Lifefactory (2026)
- How to clean and sterilize bottles, Dr. Brown’s (2026)
- FAQ, Dr. Brown’s (2026)
- Parent’s Ally Support, Evenflo Feeding (2026)
- Frequently Asked Questions, ezpz (2026)
- CourtListener docket records: Miller v. Philips North America LLC (3:24-cv-03781) and Miller v. Handi-Craft Company, Inc. (4:24-cv-03782), CourtListener (Free Law Project) search of federal docket records (2025)
- Plastics Litigation Tracker: Miller v. Philips North America and Miller v. Handi-Craft, Plastics Litigation Tracker (2025)
- Order on the motion to dismiss, Miller et al. v. Philips North America LLC (Entry 46-1), U.S. District Court, N.D. Cal., as hosted by the State Impact Center (2025)
- CPSC recall database search by brand, U.S. Consumer Product Safety Commission (SaferProducts.gov recall service) (2026)
What we haven't checked yet
- None of the 13 products has an independent laboratory report for its exact SKU. The third-party results we found are Consumer Reports’ line-level test and informal XRF screens, none of which names an exact SKU with detection limits, and the Comotomo results are for an earlier version.
- Exact-SKU microplastic and nanoplastic release was not found for any product, the health significance of infant ingestion of particles has not been established, and we could not re-read the abstract of the 2025 Food Control study behind our PPSU and silicone particle statements.
- No independent teardown or laboratory report was found for Pura’s no-solder statement on its non-insulated bottles, so it is recorded as a manufacturer statement. Pura’s lead-solder history concerns its insulated bottles and is described on each Pura page.
- The laboratory behind Pura’s testing claim is unnamed, and its methods, results and detection limits are not published. The same is true of ezpz’s third-party testing statement, which we read through ezpz’s FAQ and a search excerpt because its cup page would not render its details.
- Which capacities MADE SAFE’s line-level listings for Pura’s Kiki bottles cover was not confirmed, and the listing pages show no certification date or test data.
- Comotomo’s ring is PPSU according to BASF, not Comotomo’s US page, and the Gen 2 cap and nipple materials are not stated. The Evenflo Balance+ ring, cap and vent materials and the Munchkin Miracle 360 component materials are not stated on the pages and manual we read.
- Dr. Brown’s materials come from a family-level page, and its regional and support pages differ. Philips’s materials page is family-level, its BPS statement does not list the SCY913/04, and the model’s support page has no care or materials document.
- Metal migration (lead, cadmium, arsenic, mercury, nickel, chromium), siloxane migration and PFAS or fluorine testing under laboratory conditions were not found for any exact product here.
- We confirmed the closing dates of the Philips and Dr. Brown’s cases from federal docket records and a litigation tracker but could not open the dockets’ entries directly, and we did not find the terms of any Philips settlement.
- We did not review other brands with US bottle lines, including Pigeon, NUK, MAM, Tommee Tippee, Lansinoh and Boon. Their exact SKUs and materials were not reconciled, and no verdict is implied by their absence.
- Manufacturer pages, product data feeds, manuals and support pages were read on September 30, 2026. Product generations and SKUs change, so check the model and generation on the box.