Baby Bottles & Sippy Cups: Materials, Testing & Safety

Pura Kiki 11 oz Sippy Bottle

Fluid path: Stainless + siliconeNo solder: manufacturer states$$$

Quick verdict

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.

Pura states no solder, no paint and no plastic. Spout construction and cleaning steps are not described, and no independent report was found. See version details.

Product identity on record: K11CSAS (Aqua), K11CSMS (Mint), K11CSRS (Rose). Check the current product and version.

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

What we could not verify

  • Exact-SKU metal migration
  • Spout construction and cleaning steps
  • Whether MADE SAFE's line-level listing covers this capacity
  • No independent test of a non-insulated Pura bottle was found, and Pura’s historical lead-solder issue concerned insulated bottles.
  • Pura states no solder, no paint and no plastic. Spout construction and cleaning steps are not described, and no independent report was found.
Why we reached this verdict

The Kiki sippy uses the same single-wall 18/8 stainless body and platinum-cured silicone spout as Pura's other Kiki products, with a stainless and silicone collar and a silicone cover and sleeve. Pura states it is paint-free, has zero plastic, and uses no solder, because its standard non-insulated bottles use none. The spout is a separately sold replacement part with a reinforced opening, and MADE SAFE lists the Kiki sippy bottles and the XL sipper spouts. Pura's care page says the top components can be boiled for 5 minutes and that it is top-rack dishwasher safe.

A sippy cup is an optional transition tool. The American Academy of Pediatrics recognizes open cups, straw cups and spouted cups, and advises that anyone who prefers a sippy cup choose one with no valve. Pura's page does not say whether this spout contains one or how to clean it, so we can't tell whether it meets that guidance. As with the other Kiki bottles, the construction and testing points are Pura's statements with no independent report.

Last reviewed .

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Last reviewed

What we like and what concerns us

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

What the evidence shows

  • Pura Stainless (MADE SAFE certified products collection) MADE SAFE

    The collection page lists "Kiki Sippy Bottles" among Pura products with MADE SAFE certification. It shows no capacity, SKU, test data, method or detection limits, and no certification date (the year given is when the page was viewed). It is a product-line listing and does not state that the 11 oz sippy bottle was checked for particle release or solder.

    Certification record. About the same product line, not this exact item.

These are independent sources we located and read. Manufacturer statements are not counted as evidence. How we weigh sources

Why we reached this verdict

Verdict: Leading design.

The Kiki sippy uses the same single-wall 18/8 stainless body and platinum-cured silicone spout as Pura's other Kiki products, with a stainless and silicone collar and a silicone cover and sleeve. Pura states it is paint-free, has zero plastic, and uses no solder, because its standard non-insulated bottles use none. The spout is a separately sold replacement part with a reinforced opening, and MADE SAFE lists the Kiki sippy bottles and the XL sipper spouts. Pura's care page says the top components can be boiled for 5 minutes and that it is top-rack dishwasher safe.

A sippy cup is an optional transition tool. The American Academy of Pediatrics recognizes open cups, straw cups and spouted cups, and advises that anyone who prefers a sippy cup choose one with no valve. Pura's page does not say whether this spout contains one or how to clean it, so we can't tell whether it meets that guidance. As with the other Kiki bottles, the construction and testing points are Pura's statements with no independent report.

Verification required

Pura states no solder, no paint and no plastic. Spout construction and cleaning steps are not described, and no independent report was found.

  • Construction verification partial.
  • Exact-product laboratory testing: none found, so testing verification is required.

Product identity

Product typeSpout (sippy) cup
Capacity11 oz total; 9 oz marked
Age or flow range6 months and up (manufacturer)
Exact SKUK11CSAS (Aqua), K11CSMS (Mint), K11CSRS (Rose)
UPC850079612150 (Aqua), 850079612167 (Mint), 850079612174 (Rose)
RegionUnited States
Market statusCurrent when checked
Generation or lineNot stated
Last verifiedSeptember 30, 2026

SKUs and UPCs come from Pura’s product data feed. The feed describes a reinforced spout opening.

What touches the liquid

Explore the evidence

The parts in the record

Expand a material card to explore its evidence. The illustration is a concept, not an exact assembly or teardown.

Category concept, not a product teardown. Shapes do not establish exact construction, layer order or dimensions.

Pura states no solder, no paint and no plastic. Spout construction and cleaning steps are not described, and no independent report was found.

Body
Material
18/8 stainless steel, single-wall
Contact with the liquid
Touches the liquid
Evidence basis
Manufacturer states
Sippy spout
Material
100% medical-grade, platinum-cured silicone
Contact with the liquid
Touches the liquid
Evidence basis
Manufacturer states
Collar
Material
Stainless steel and silicone construction (Pura's wording)
Contact with the liquid
Touches the liquid
Evidence basis
Manufacturer states
Travel cover
Material
Silicone
Contact with the liquid
Does not touch the liquid
Evidence basis
Manufacturer states
Sleeve
Material
Silicone
Contact with the liquid
Does not touch the liquid
Evidence basis
Manufacturer states

The body material is only one part of this product. Each part below is listed with what the maker says it is made of, and whether it reaches milk, formula or water.

PartMaterialContact with the liquidWhere this comes from
Body18/8 stainless steel, single-wallTouches the liquidManufacturer states (Pura Stainless)
Sippy spout100% medical-grade, platinum-cured siliconeTouches the liquidManufacturer states (Pura Stainless)
CollarStainless steel and silicone construction (Pura's wording)Touches the liquidManufacturer states (Pura Stainless)
Travel coverSiliconeDoes not touch the liquidManufacturer states (Pura Stainless)
SleeveSiliconeDoes not touch the liquidManufacturer states (Pura Stainless)

Construction, coatings and base

WallSingle-wall, non-insulated
Coatings, paint and decorationPura states the bottle is paint-free.
Base and solder constructionNo solder: manufacturer states. Pura states there is 'no solder in our standard non-insulated bottles'; this bottle is single-wall and non-insulated. No independent teardown was found. Source: Pura Stainless, manufacturer disclosure.

Stainless recalls involved specific products with accessible solder or a base that could detach. They don't show that stainless cups in general contain lead. What we record is whether the maker states no solder, and whether anyone independent has confirmed it.

Heat, sterilizing and dishwasher

BoilingManufacturer states allowed
Sterilizer (steam or electric)Manufacturer states allowed
DishwasherManufacturer states allowed
Microwave (product care)Manufacturer states not allowed
Temperature limitNot stated in the sources reviewed

Pura’s care page says to boil the stainless steel and silicone top components for 5 minutes (it does not address boiling the body separately), that the bottles are top-rack dishwasher safe and electric-sterilizer safe, and not to use microwave sterilizers on metal parts or put stainless bottles in a microwave. It states “Never give a child liquid at a temperature above 99°F / 37°C” and gives warming steps for non-insulated bottles. It does not say whether the hot water the CDC calls for with higher-risk infants can be poured into the bottle, so follow the CDC guidance and ask your pediatrician.

Formula preparation: 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. Standard preparation otherwise follows the formula maker's instructions. Never use a microwave, and bottles must be clean and sanitized. Pathogen control for higher-risk infants takes priority over any concern about particle release, so this page never suggests cooler water for those babies. CDC, Infant Formula Preparation and Storage.

Cleanability

Parts (as listed)5
Parts that touch the liquidNot stated in the sources reviewed
Fully takes apartNot stated in the sources reviewed
Every wet surface visibleNot stated in the sources reviewed
Hidden wet cavityNot stated in the sources reviewed
Narrow vent, valve or straw passageNot stated in the sources reviewed
Special brush neededYes
Can dry completelyNot stated in the sources reviewed
Replacement parts soldYes

Five components are listed: bottle, collar, sippy spout, travel cover and sleeve. Whether the spout contains a separate valve is not stated, and Pura gives no spout-specific cleaning steps beyond its general instruction to use a bottle brush and not damage the drink holes or vents. Spouts are separately sold MADE SAFE-listed parts.

We show the facts and not a score. A CPSC recall in 2016 tied mold to an opaque, removable valve that held moisture, so hidden or narrow wet passages are worth checking on any cup.

What was tested, and what is only a claim

Independent testing of this exact product

None found as of September 30, 2026. That is missing evidence, not a finding against the product. Where a laboratory report is published, we will show the lab, method, batch, analyte, result, unit and detection limits, and we will never write a non-detect as zero.

What the manufacturer states

  • BPA, BPS, phthalates, lead: 'BPA-free. BPS-free. PP-free. Phthalate-free. Lead free.' Manufacturer disclosure Pura Stainless
  • Plastic: Pura states the bottle, sleeve, collar, sippy spout and travel cover contain zero plastic. Manufacturer disclosure Pura Stainless
  • Pura's site-wide statement: components independently tested by an unnamed lab with no detectable BPA, lead, phthalates, nitrosamines, cadmium or PVC. No report is published, and this product page states no testing. Manufacturer testing claim Lab not named. No report, method or detection limit is published. Pura Stainless

Background evidence about the materials (not this product)

These studies tested generic products, not this exact one. They show what is possible, and they don't show that this product releases anything or causes harm.

  • Stainless steel: 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. Evidence for stainless steel
  • Silicone: 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. Evidence for silicone

Certifications, and their scope

CertificationItem listed and statusScopeWhat it does not establish
MADE SAFE'Kiki Sippy Bottles' at product-line level and 'Kiki XL Sipper Spouts' as a component, on MADE SAFE's Pura collection. Listed as certified. No date shown.The named lines and components. No capacity or SKU is listed.No test data, method, batch or detection limits are shown, and the listing does not state whether particle release or solder was assessed.

History that bears on this evidence

  • Pura’s insulated bottles and lead solder. Insulated Pura bottles only. It does not describe the non-insulated bottle reviewed here. Pura states that insulated bottles it made before 2017 could have a solder material containing lead, that it has used a certified lead-free solder in insulated bottles since 2017, and that its standard non-insulated bottles use no solder. A lead-testing advocate, Tamara Rubin, reports XRF screening that found a lead-containing sealing dot on the bottom of insulated Kiki bottles bought through at least January 2018, including one labelled MADE SAFE Certified, and says the issue is not relevant to Pura’s non-insulated bottles. Her account is not a regulator’s finding, gives no numeric results, and no CPSC recall of Pura bottles was found. Pura Stainless, Lead Safe Mama (Tamara Rubin), U.S. Consumer Product Safety Commission (SaferProducts.gov recall service)
  • What a MADE SAFE listing does and does not show. All Pura products that carry the listing. The MADE SAFE listing pages show that a product is listed as certified. They do not show test data, methods, batches or detection limits, and they do not say whether solder or base construction was assessed, so the listing cannot on its own verify a construction statement. MADE SAFE (Made Safe Index), MADE SAFE (Made Safe Index)

Recalls and legal history

No recall of this exact product was located in the sources reviewed. A recall elsewhere in the category does not apply to it.

We searched the CPSC recall database by brand on September 30, 2026. For Pura Stainless: No bottle or cup recall. The only Pura recall found is a fragrance diffuser unrelated to bottles. CPSC recall service

  • Green Sprouts, CPSC 23-711: The stainless-cup lead recalls involved other brands' solder or base construction. Pura states this bottle uses no solder; that is a manufacturer statement.

What we still don't know

  • Exact-SKU metal migration
  • Spout construction and cleaning steps
  • Whether MADE SAFE's line-level listing covers this capacity
  • No independent test of a non-insulated Pura bottle was found, and Pura’s historical lead-solder issue concerned insulated bottles.

What would change our verdict

  • An independent laboratory report or teardown for this exact bottle
  • Cleaning instructions showing a hidden valve or wet cavity
  • Evidence of solder, a coating or a plastic part in the fluid path

Price

Price tier$$$ $ under $15 per unit; $$ $15 to $24.99; $$$ $25 and up, by the manufacturer's listed price.

Prices and stock change often. Price and retailer availability play no part in the verdict.

Sources

Every source below was checked on the date shown, and the kind of evidence is named.

  • Kiki 11oz Sippy Bottle, Pura Stainless. Manufacturer disclosure Accessed September 30, 2026. Pura states: 18/8 stainless single-wall body, platinum-cured silicone sippy spout, stainless and silicone collar, plastic-free, paint-free, top-rack dishwasher safe, 6 months and up, five components, listed. Whether the spout holds a separate valve is not stated. Product data feed: Aqua K11CSAS UPC 850079612150, Mint K11CSMS UPC 850079612167, Rose K11CSRS UPC 850079612174; a reinforced spout opening. SKUs and UPCs were read from the page’s product data feed on 2026-09-30.
  • A note about sustainability and safety from our founders, Pura Stainless. Manufacturer disclosure Accessed September 30, 2026. Pura states there is 'no solder in our standard non-insulated bottles', that it has used a certified lead-free solder for insulated bottles since 2017, and that some insulated bottles made before 2017 could have a solder material containing lead.
  • Innovation and technology, Pura Stainless. Manufacturer disclosure Accessed September 30, 2026. Pura states that its bottles, components and accessories were independently tested by 'a leading global testing lab' and have no detectable BPA, lead, phthalates, nitrosamines, cadmium or PVC. No lab name, report, method, limit or date is given.
  • Pura Stainless MADE SAFE Certified Products, MADE SAFE (Made Safe Index). Certification Accessed September 30, 2026. MADE SAFE lists Pura's Kiki bottles at product-line level as certified. Which capacities the listing covers is not shown. Lists product lines by name: 'Kiki Infant Bottle', 'Kiki Sippy Bottles', 'Straw Bottles', 'Kiki Natural Vent Nipples', 'Kiki XL Sipper Spouts', 'Kiki Silicone Straw' and others. It gives no capacity, SKU or date.
  • Discontinuing the Bottle, American Academy of Pediatrics / HealthyChildren.org. Regulatory Published July 3, 2023. Accessed September 30, 2026. The AAP says to offer a cup, open or with a straw, from around 6 months and to finish the bottle transition between 12 and 18 months. It calls the sippy cup an optional step and advises that anyone who prefers one should choose a cup with no valve, noting that many sippy cups have a valve under the spout that makes a child suck as from a bottle. The page shows the date 7/3/2023.
  • Green Sprouts Recalls Toddlers' Stainless Steel Bottles and Cups Due to Lead Poisoning Hazard, U.S. Consumer Product Safety Commission. Regulatory Published November 23, 2022. Accessed September 30, 2026. About 10,500 units; the bottom base can break off and expose a solder dot that contains lead; seven reports of base breakage; no injuries reported. Recall number 23-711. The URL carries 2023 but the notice is dated November 23, 2022.
  • 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). Independent study Published April 16, 2026. Accessed September 30, 2026. Tested migration of 35 siloxanes from 30 silicone food-contact products into food simulants under worst-case conditions and modelled exposure. Cyclic siloxanes exceeded proposed limits in several samples, particularly for children; D4 and D5 showed negligible risk while D3 raised potential concern, and 14 low-molecular-weight siloxanes (including D6 and L12) exceeded the threshold of toxicological concern across all age groups in the modelled scenarios. The products were silicone food-contact items sold in China, not the products on this page, and the exposure figures are modelled. Abstract read through Crossref.
  • Cleaning & Care, Pura Stainless. Manufacturer disclosure Accessed September 30, 2026. Pura states: place the stainless steel and silicone top components in boiling water for 5 minutes; top-rack dishwasher safe and electric-sterilizer safe; do not use microwave sterilizers for any metal parts; never put stainless steel bottles in the microwave; clean with warm water, mild soap and a bottle brush, removing the metal ring of silicone collars to clean under it; and “Never give a child liquid at a temperature above 99°F / 37°C”. It gives warming steps for non-insulated bottles.
  • #Leaded: Made Safe Certified Pura Kiki Baby Bottle Purchased New in January of 2018, Lead Safe Mama (Tamara Rubin). Independent test Accessed September 30, 2026. The author reports that XRF screening of a Pura Kiki insulated stainless steel baby bottle bought new in January 2018, labelled MADE SAFE Certified, found a lead-containing sealing dot on the bottom cap. This concerns an insulated bottle, not the non-insulated bottles on this page. Posted in July 2018. An advocacy tester’s account. It gives no numeric result, and a later post by the same author says the issue is not relevant to Pura’s non-insulated bottles.
  • CPSC recall database search by brand, U.S. Consumer Product Safety Commission (SaferProducts.gov recall service). Regulatory Accessed September 30, 2026. No CPSC recall of a bottle or cup was found for Pura Stainless, Lifefactory, Philips Avent, Dr. Brown’s/Handi-Craft, Hegen, Comotomo, ezpz, Munchkin or Evenflo. The recalls found for those brands concerned other products: Philips Avent video monitors (2023), Dr. Brown’s pacifier holders (2018) and bottle soap (2017), Munchkin pacifiers (1995) and shoes (2001), and a Pura fragrance diffuser (2025). Searched by brand on 2026-09-30. Some searches returned a service error and were repeated; the results are summarized on the recalls block.
  • Pura Kiki Natural Vent Nipples, MADE SAFE (Made Safe Index). Certification Accessed September 30, 2026. The Kiki Natural Vent Nipples are listed as MADE SAFE Certified in all currently available sizes. The madesafe.org address redirects to index.madeworks.com. The listing page shows no certification date and no materials.

Read the category’s editorial sources

Final verdict against our baby bottles and sippy cups standard

Leading design Published as Leading design under the published standard for baby bottles and sippy cups, based on the specific, dated findings above. We apply that standard the same way to every product on this page, and it doesn't change to fit a favorite See the full site-wide standard for how every category is held to the same process.

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