Stainless steel water bottles, rated on what they’re made of

• The warranty covers only the stainless steel components. The silicone is the wear part and the part actually in the child’s mouth, and it is excluded. [1]
• No country of manufacture anywhere on the site — unusual for a brand whose entire pitch is material transparency, and the single thing keeping this off a perfect score in our notes. [1] [3]
• “Why Pura?” says “food service grade stainless steel” without a number; only the product pages say 18/8. The grade is asserted, never sourced or certified. [1] [3]
• No PFAS statement at all — which on steel and silicone is defensible, and which we note because every competitor makes one. [1]

Sources (3)

1. Pura Sport Mini 11 oz with sleeve
2. Pura Kiki 11 oz Sippy — same materials, cold drinks only
3. Why Pura? — MADE SAFE certification and the grade wording

• The steel grade is on the Manufacturing FAQ, not the product page. A buyer reading only the listing gets “18/8”; the 304 equivalence and the lead-solder disclosure are two clicks away. [1] [2]
• Names its compliance regimes specifically — “accredited third-party labs”, US FDA, California Prop 65, EU REACH and SVHC. No certificate is published, so this is an assertion with named standards rather than evidence. [2]
• A page titled “Manufacturing FAQ” that does not name a country of manufacture. The omission is conspicuous given the page’s title. [2]
• The straw cap for this bottle carries a warning against hot drinks, and its polymer is not named. The Magslider lids sold separately are named — polypropylene #5 and Eastman Tritan. [1] [3]

Sources (3)

1. YETI Rambler 26 oz Color Cap Straw Bottle
2. YETI Manufacturing FAQ — 304/18-8, the lead detection limit and the solder admission
3. YETI Rambler FAQ — BPA claim, dishwasher and heat guidance

• The 18/8 grade and the country are stated in the company FAQ, not on the product page, which says only “90% Recycled Steel”. Both linked below. [2]
• Testing scores only 1 of 3, and it is worth being precise about why, because it is easy to read their page as more than it is. Intertek appears twice — as a recycled-content verifier and behind a sustainability certification. Neither is safety testing of this bottle. GreenScreen is not a certification they hold: it is a hazard-scoring method they say they used internally while formulating the Klean Coat exterior powder coat. The bottle itself has no published test report. [2]
• Klean Kanteen says all its products are lead-free and that its insulated line uses silica/glass plugs rather than lead solder. Independent tester Tamara Rubin disputes this for the insulated bottles and recommends only the non-insulated ones. We found no company response to her specifically. This single-wall bottle sidesteps the argument entirely by having no vacuum seal at all. [3]
• Hand wash the printed ones if you want the graphics to survive. [1]

Sources (3)

1. Klean Kanteen 12oz Kids Classic with Sport Cap
2. Klean Kanteen FAQ — steel grade, lining, country, sealing method
3. Tamara Rubin, water bottle recommendations and the insulated-bottle dispute

• “BPA-free stainless steel” is a claim about the wrong material. BPA is a polycarbonate monomer; steel never contained it. The claim is attached to the steel rather than to the lid, which is the part where the question is real. [1]
• The lead claim is the vaguest form used by any brand here: products “do not pose a risk of lead exposure”. That is a risk conclusion, not a composition statement, and no lab, limit or vacuum-seal disclosure accompanies it. [2]
• The product page markets 12-hour cold retention; the downloadable care guide escalates to a capitalised “NOT FOR USE WITH HOT LIQUIDS: For cold liquids only”, while the FAQ separately explains how to preheat Thermos products. Three documents, three impressions. [1] [2] [3]
• Country of manufacture is stated plainly as China. Only three brands in this category do that. [1]

Sources (3)

1. Thermos FUNtainer 12 oz Water Bottle
2. Thermos FAQ — the PP#5 / 18-8 / silicone / LDPE breakdown and “no interior coating”
3. Thermos FUNtainer Care & Use Guide (PDF)

• “Lead safe”, not “lead free” — a deliberately weaker word, on the one bottle here with no vacuum seal and therefore no solder, where the stronger claim would have been easiest to make. No laboratory is named. [1]
• The 90-day manufacturer warranty is the shortest of any bottle on this page, and the separate 30-day breakage replacement is capped at one bottle per customer, ever. [2]
• Freezing the glass voids the warranty, and that appears only in the FAQ — not on any product listing. Soda-lime tolerates thermal shock poorly, so the rule follows from the material, which is exactly why naming the material matters. [1] [2]
• Manufacture is stated as PRC with design in San Francisco. Stated plainly rather than implied. [1]

Sources (2)

1. bkr FAQ — soda-lime vs borosilicate, cap and gasket materials, lead-safe wording
2. bkr warranty and breakage policy

• The FAQ is where the consequence lives, in capitals: “DO NOT PUT OUR GLASS HYDRATION BOTTLES IN THE FREEZER OR BOILING WATER”. Soda-lime is not thermal-shock resistant and their baby bottles, which are borosilicate, are. Same brand, two glasses, one of them explained only if you go looking. [2]
• “BPA-free” is the headline claim on a glass bottle. It can only be about the polypropylene cap; on the body it was never a question. [1]
• The headline feature gets the shortest warranty: one year on glass bottles against five on their steel vacuumware, and breakage is not addressed either way. [3]
• Glass made in France, cap and sleeve made in the US, assembled in the US — component-level origin, which nobody else here publishes. [2]

Sources (3)

1. Lifefactory 22 oz glass bottle with classic cap
2. Lifefactory FAQ — soda-lime vs borosilicate, origin, the freezer and boiling-water ban
3. Lifefactory warranty terms

• “Hardshell™ powder coating” is described as “durable nontoxic” — a trade name plus an adjective, with no chemistry. Powder coats are commonly polyester or epoxy-polyester; MiiR never says which, and “nontoxic” is unverifiable as written. [2]
• “BPA-free construction” is claimed for the whole bottle, but the body is steel. The claim can only apply to the PP lid, and the framing implies more than it delivers. [1]
• The gasket is undisclosed across every MiiR product page we read, despite being a direct food-contact part. [1] [2]
• Country and supplier detail are unusually specific: manufactured in China, in Wuyi, Yongkang and Shenzhen, with MiiR’s own office in Jinhua and required SMETA audits. [3]

Sources (3)

1. MiiR Wide Mouth Bottle
2. MiiR — what are MiiR products made of?
3. MiiR — where are MiiR products made?

• The lifetime warranty explicitly excludes “lids, seals and straws” — the parts most likely to fail, on a product whose selling point is the lid. The same company then offers the lifetime warranty specifically if the base cap comes off, which is the failure that would expose the lead pellet. [2] [3]
• CPSC recall 25-063, December 2024: 2.6 million Switchback and Trigger Action travel mugs, because “the mug’s lid threads can shrink when exposed to heat and torque”. 38 burn injuries globally, 11 needing medical attention. The Quencher was not in that recall — but it is the same maker and the same lid-thread engineering. [4]
• Consolidated false-advertising class actions over the undisclosed lead were dismissed in Stanley’s favour on 3 April 2026, with leave to amend. The judge held that “the mere presence of lead could not be material to a reasonable consumer” absent a demonstrated risk. [5]
• The product page says flatly “dishwasher safe”; the FAQ qualifies it to top rack only, away from the hottest water. The recalled mugs failed on heat plus torque at the lid threads. [1] [2]

Sources (5)

1. Stanley Quencher H2.0 FlowState 40 oz
2. Stanley FAQ — 18/8 stated as grade 304
3. Stanley support article — “Do Stanley products contain lead?”
4. CPSC recall 25-063, Stanley travel mugs, December 2024
5. Bloomberg Law — Stanley defeats false-ad suits over lead, April 2026

• No steel grade published anywhere. Every other named-steel brand on this page states 18/8 or 304; Owala’s FAQ says only “triple-layer insulated stainless steel”. [2]
• Credit where it is due: Owala names its plastic supplier and resin by brand — Eastman Tritan — and states it is phthalate-free. Most competitors say “BPA-free plastic” and stop. [1]
• Compare the lead claim with YETI’s, which publishes a detection limit of 0.002 mg/kg and concedes solder. Owala’s is the stronger sentence and the weaker file. [3]
• No country of manufacture anywhere on the site — a real gap, given the lead-free claim rests entirely on Owala’s own control of its supply chain. [1] [2] [3]

Sources (3)

1. Owala FreeSip product page
2. Owala FAQ — Tritan, care and warranty exclusions
3. Owala — “Lead free stainless steel water bottles”

• The warranty covers broken lids — the opposite of Stanley, which excludes lids, seals and straws by name. That is real, checkable disclosure credit. [1]
• The steel grade appears on Simple Modern’s Classic Tumbler pages as 18/8, and not on this bottle’s own page. Same brand, two product lines, two levels of disclosure. [1] [2]
• The collection page carries a “Dishwasher Safe” badge; the product page says the bottle is hand-wash only and only the straw lid is dishwasher safe. [1] [3]
• Testing is asserted through “independent, properly accredited testing labs” with no laboratory named and no report published. [2]

Sources (3)

1. Simple Modern Summit 32 oz with straw lid
2. Simple Modern Classic Tumbler — where 18/8 is stated
3. Simple Modern Summit collection page — the dishwasher badge

• “Screw-top lid” with a “chug spout” and a “soft rubberized grip pad”. Three polymer components, three blanks. [1]
• The page does not state whether the steel interior has any liner or coating. On insulated bottles at this price that is worth asking. [1]
• “BPA-free” is the only chemical claim, and it is not attached to any named polymer, so it cannot be checked for BPS or BPF substitution. [1]
• “Safely designed for top-rack dishwasher cleaning”. No warranty, no country of manufacture, no testing — consistent across all 21 Walmart house-brand products we checked. [1]

Sources (1)

1. Walmart — Ozark Trail 40 fl oz Insulated Stainless Steel Water Bottle

• “Spill-proof lid” and the straw are both unnamed plastics in direct mouth and liquid contact. [1]
• “Powder-coated, sweat-free exterior” — composition not published. [1]
• “Keeps cold 34 hours or hot for up to 6 hours” with no test method cited. [1]
• “BPA-free water bottle” is the chemical claim, made without naming any resin. [1]

Sources (1)

1. Walmart — Ozark Trail 32 fl oz Insulated Flip-Straw Water Bottle

• Two years is by far the shortest warranty of any premium bottle here, on the most expensive-per-ounce product on the page, and it requires photographic evidence to claim. [2]
• Not dishwasher safe, and a published ceiling of 185°F / 85°C — the only numeric beverage temperature limit any bottle brand here publishes. Credit the specificity; the silicon dioxide lining is what imposes it. [1] [2]
• The tops are “BPA-free plastic” and the gasket is not named at all, on the parts you drink through. [1] [2]
• No country of manufacture on the product page or the FAQ. [1] [2]

Sources (2)

1. Purist Mover 18 oz product page
2. Purist FAQ — amorphous silicon dioxide, lead-free incl. vacuum seal, warranty terms

• The page’s own metadata references “NSF/ANSI certified” while the body of the page certifies only to WQA and names no NSF/ANSI standard number. Two elements of one page disagree about the certification. [1] [2]
• Explicitly not dishwasher safe — “Never use abrasive detergents or a dishwasher” — on a $39.99 bottle in a category where dishwasher safety is standard. [1]
• Steel grade, country of manufacture and warranty are all absent from the manufacturer’s pages. [1] [2]
• If microplastics are the reason you are buying this, read what NSF 401 actually certifies first — this bottle is not certified to it. [2]

Sources (2)

1. Brita Premium Filtering Water Bottle, stainless steel 32 oz
2. Brita — second URL for the same product, carrying the WQA wording

• The AB 1200 disclosure is the manufacturer’s own filing against a designated chemical list, not third-party testing, which is why it counts as a declaration rather than a test. It is also not component-level — every product in a category gets an identical entry. [2]
• Hydro Flask says it moved away from the industry-standard leaded sealing dot in 2012. Tamara Rubin’s XRF testing describes pre-2018 Hydro Flasks as having leaded dots, while naming post-2018 Hydro Flask as consistently lead-free. Both accounts cannot be exactly right, and we found no reconciliation — but on the current product they agree. [3] [4]
• Stainless grade, cap plastic, boot material and country of manufacture are all unstated. [1]
• Not for hot liquids, not for the freezer, ages 3+. [1]

Sources (4)

1. Hydro Flask Kids 12 oz Bottle
2. Hydro Flask required materials disclosure (California AB 1200)
3. Hydro Flask FAQ on lead and bottle sealing
4. Tamara Rubin, water bottle testing and recommendations

• No lead claim of any kind. Reasonable on an unvacuumed glass bottle with no solder — but every other brand here makes one, so its absence is a data point rather than a neutral. [1]
• Credit: “Not designed for use with hot or carbonated beverages” sits on the product page itself rather than in a care PDF. Given the glass type is undeclared, that is the right place for it. [1]
• The limited lifetime warranty is restricted to original purchasers in the US and Canada, and its full terms are referenced rather than published. [1]

Sources (1)

1. Ello Syndicate 20 oz Glass Water Bottle

• Its own siblings at the same price say “18/8”. This one says only “stainless steel”. The grade disclosure is inconsistent within one range at one retailer. [1] [2]
• The screw-top lid “doubles as a portable drinking cup”, so it is explicitly a drinking vessel, and its material is not published. [1]
• “Silver” exterior finish — type not published. [1]
• No dishwasher guidance, no warranty, no country of manufacture, no testing. [1]

Sources (2)

1. Walmart — Ozark Trail 1.1-Liter Insulated Stainless Steel Bottle
2. Walmart — Ozark Trail 40 fl oz, which does state 18/8

• “Leakproof when slider is locked” implies a gasket. Its material is not published. [1]
• “BPA Free” is claimed without naming the resin, so it cannot be checked for BPS or BPF substitution. [1]
• The bullets say “Dishwasher-Safe Lid and Hand-Washable Cup”; the spec field flatly says “Cleaning: Hand Wash”. A shopper reading only the spec table would hand-wash a dishwasher-safe lid. [1]
• Made in China, stated. No warranty published. Costco’s bottle listings name the body as stainless and say nothing about the spout, lid or gasket — the Contigo Autoseal 2-pack on the same site makes no BPA claim at all despite a plastic lid. [2]

Sources (2)

1. Costco — Owala SmoothSip Slider 20oz 2-Pack
2. Costco — Contigo Autoseal Couture 20oz 2-Pack

• No BPA claim at all, on a plastic-lidded drink bottle. Its Costco shelf-mate Owala does make one. Neither names a resin. [1] [2]
• “Spill & leak-proof AUTOSEAL technology” is the headline feature and the seal material is not published. [1]
• Steel grade not published — no 18/8, no 304. [1]
• Made in China, stated. “Top rack dishwasher-safe lid, hand wash body”. No warranty published. [1]

Sources (2)

1. Costco — Contigo Autoseal Couture 20oz 2-Pack
2. Costco — Owala SmoothSip Slider 20oz 2-Pack

• Takeya’s FAQ contains exactly the right questions — “WHAT IS MY TAKEYA STAINLESS STEEL BOTTLE MADE OF?” and “WHERE ARE TAKEYA STAINLESS STEEL BOTTLES MADE?” — and serves the answers dynamically. We could not retrieve them. We are recording this as our retrieval limit, not as Takeya’s silence, and we will revise if they publish. [2]
• The product page says “DISHWASHER SAFE”. Takeya’s own FAQ carries the question “MY BOTTLE SAYS HAND WASH ONLY ON THE BOTTOM. IS IT DISHWASHER SAFE?” — so the physical bottle is marked hand-wash while the website markets it otherwise. [1] [2]
• No heat guidance and no temperature limit, on a bottle marketed as keeping drinks hot for 12 hours. [1]

Sources (2)

1. Takeya Actives Insulated Water Bottle
2. Takeya FAQ — question headings including the hand-wash contradiction

• No “free of” claim at all, and no steel grade, on a brand whose competitors all make one and whose copy leans hard on the word “premium”. [1] [3]
• No care or heat guidance published on the product page, for a bottle marketed as holding liquids “up to 12 hours piping hot”. [1]
• Credit where due: the warranty page is unusually specific about which three defects are covered — leakage, insulation flaws and rattling noise — and requires no registration. It is more concrete than most lifetime boilerplate, even while it contradicts the marketing. [2]

Sources (3)

1. Iron Flask 40 oz Wide Mouth with straw lid
2. Iron Flask warranty — covered defects and the one-year leak exclusion
3. Iron Flask water bottles collection

• The warranty excludes the headline feature. The bottle is sold on its colour, and the terms exclude “color finish damage” — while separately excluding “damage from cleaning” on a product the same page calls dishwasher safe. [2]
• No “free of” claim at all. That is arguably more honest than a BPA-free badge on steel — and it leaves the lid plastic entirely unidentified. [1]
• The US help-centre and FAQ warranty pages are JavaScript-rendered and returned metadata only. The terms above come from Hydro Flask’s own Australian site. We are flagging that rather than presenting it as the US text. [2] [3]
• No temperature, freezer or microwave guidance of any kind on the product page. [1]

Sources (3)

1. Hydro Flask 32 oz Wide Mouth
2. Hydro Flask warranty terms (their Australian site — the US pages returned no body text)
3. Hydro Flask US help centre warranty article — returned metadata only

• No “free of” claim of any kind on a children’s product, while the same page surfaces a California Prop 65 resident warning reference. That combination is the most interesting gap we found in this category. [1]
• The percentages are published but not mapped to parts, so you know the bottle is 5% LDPE without knowing which piece it is. [1]
• “Lifetime” is defined honestly as the life of “the components, fabrics and materials” — not the owner’s lifetime — and the remedy is replacement only, never a refund. [2]
• No heat guidance whatsoever on a bite-valve kids’ bottle sold as dishwasher safe. [1]

Sources (2)

1. CamelBak Eddy+ Kids 14 oz with Tritan Renew
2. CamelBak “Got Your Bak” warranty terms

• “50% waste plastic (using ISCC certified mass balance)” needs a footnote Nalgene does not provide. Mass balance is an accounting method: it does not mean half the molecules in this bottle came from waste. The scheme is named on the product page and explained nowhere on the site. [1] [3]
• A “Lifetime Guarantee” consisting of one sentence, with no exclusions document, no duration mechanics and no claim process published. [2]
• No phthalate claim and no cap material, on the component in constant contact with the drinker’s mouth. [1] [3]
• No maximum temperature, no microwave guidance and no hot-liquid limit published — only “dishwasher-safe”. [1]

Sources (3)

1. Nalgene 32 oz Wide Mouth Sustain
2. Nalgene “Our Promise” — lifetime guarantee wording and US manufacturing
3. Nalgene Tritan Renew category page

• The brand’s reputation works against the buyer here. Zojirushi is known for bare electropolished SlickSteel®, and the same blog quietly confirms that “newer models like SM-TA, SJ-JS” moved to a nonstick coating. Same maker, two opposite material stories, and the product page does not flag which you are getting. [2]
• PFOA-free is claimed on the blog and not on the product page, and there is no PFAS claim at all. PFOA-free on a PTFE coating is the classic narrow hedge. [2]
• The page carries a California Prop 65 “CANCER AND REPRODUCTIVE HARM” warning alongside the BPA-free claim. Note their bare-steel SV-GWE50 carries the same warning, so the warning alone does not distinguish the coated model. [1] [3]
• The five-year warranty covers only the thermal insulation. The coating, the lid and the gasket all sit outside it. [1]

Sources (3)

1. Zojirushi SJ-JS10 35 oz stainless bottle
2. Zojirushi blog — SlickSteel vs PTFE nonstick, and which models are which
3. Zojirushi SV-GWE50 — the bare SlickSteel comparator, same Prop 65 warning

• A remedy that itself had to be recalled is a rare and serious signal. The 2020 notice cites “additional incidents with replacement lids provided in previous recall”. [3] [4]
• The recalled part was the silicone spout — and Contigo still does not name the straw or spout material on the current kids’ product page. [1] [2]
• Brand-level hedging: the materials FAQ says “many” plastic bottles are Tritan, without saying which. From Contigo’s own pages you cannot determine what resin this children’s bottle is. [2]

Sources (4)

1. Contigo Kids Straw Water Bottle with AUTOSPOUT lid, 14 oz
2. Contigo Materials & Construction FAQ
3. CPSC — Contigo recalls 5.7 million kids' water bottles, August 2019
4. CPSC — Contigo re-announces recall after replacement lids also failed, 2020