Products · Water bottles & drinkware · Klean Kanteen
Klean Kanteen Wide 40 oz Water Bottle with Wide Loop Cap, Brushed Stainless
Reader ratings
A large single-wall steel bottle with a steel-lined cap and silicone gaskets; the maker says no plastic touches the drink. Lead Safe Mama's X-ray tests find the brand's non-insulated bottles lead-free. About $0.80 an ounce.
Best for Carrying a day's water, or filling from a stream or filter, in plain steel without paying for insulation.
- Our rating
- Good (4.1 of 5)
- Price range
- Mid-range
- Size
- 40 fl oz (1,182 mL), single wall, 2.125 in wide mouth, 8.6 oz empty
- Made in
- Designed in Chico, California and made in China, per the maker's FAQ
approx. $32 for the 40 oz bottle with its cap
See it on Klean Kanteen’s site → (opens in a new tab)We are not affiliated with Klean Kanteen. This link goes to the maker’s own page, with no tracking code. How we're funded.
Also sold at Amazon ($32), EarthHero ($32), Walmart ($32) .
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Your review
Reviews are personal experiences, not research, and they never change our quality ratings. Every review is read by our team before it appears.
How we evaluated it
How it scores Our rating, metric by metric
- What touches your drink 45% of the rating 4 of 5
A steel bottle with a steel-lined cap and silicone gaskets, but the maker's own pages disagree on whether the cap is all steel, so we do not give full marks; the Brushed bottle is uncoated.
- Independent testing 20% of the rating 4 of 5
Lead Safe Mama's February 2026 list links this bottle among those it has found lead-free in all components with XRF, but publishes no result for it.
- Durability 15% of the rating 5 of 5
A lifetime limited warranty against defects for the original buyer, no vacuum to lose, and replacement gaskets ($7.95) and caps ($11.95) sold separately.
- Trust 10% of the rating 3 of 5
It names the steel grade and country of manufacture and answers the lead question in its FAQ, but its cap descriptions conflict, it had a 2010 recall of a different part, and Lead Safe Mama's owner calls its lead-free advertising misleading for its older insulated bottles; no Prop 65 notice.
- Value 10% of the rating 4 of 5
$31.95 for 40 oz is about $0.80 an ounce, the cheapest per ounce of the steel bottles here that pass.
The rating, 4.1 of 5, is the weighted average of these scores. See how we rank water bottles & drinkware and our standard.
Where to buy Stores and the prices we saw
- Amazon (opens in a new tab) approx. $32. Wide 40 oz with Loop Cap in Brushed Stainless at $31.95, the same bottle Lead Safe Mama links. Ships from Amazon but is sold by Pattern Professional, a third-party seller listed under the Klean Kanteen Store, not by the brand itself; opened 2026-11-03.
- EarthHero (opens in a new tab) approx. $32. The 40oz Wide with Loop Cap in Brushed at $31.95, shown as fulfilled and shipped by Klean Kanteen; EarthHero is one of the retail partners the maker lists on its Where to Buy page. Opened 2026-11-03.
- Walmart (opens in a new tab) approx. $32. Listed as the 40oz Wide Loop Cap bottle in Brushed Stainless (same UPC as the maker's) at $31.95; sold by Pattern, a marketplace seller, and delivered by Walmart, not sold by Walmart itself; opened 2026-11-03.
Prices as we saw them on November 3, 2026. They change often. These links carry no tracking code and earn us nothing.
What it’s made of What touches your food, water, skin or air
- Bottle: 18/8 stainless steel, 90% post-consumer recycled content (maker's claim); the Brushed Stainless finish has no coating, while the colored versions carry a powder coat
- Wide Loop Cap: a swivel-loop screw cap with a stainless steel interior. The maker's cap page says it is made from 18/8 steel so drinks never touch plastic, but the maker's answer on the bottle page says no cap for this bottle is all steel, buyers describe a plastic outside, and a European retailer lists steel, polypropylene and silicone. It is shown in black, and the finish is not described
- Gaskets: silicone according to buyers; the maker's page does not name the material (a kit of two replacement o-rings for Wide caps is sold for $7.95)
Who tested it What each test found, and who paid for it
- Independent Lead Safe Mama, LLC (independent advocate; earns Amazon affiliate income) February 2026
Its February 2026 water bottle list links a Klean Kanteen wide loop cap bottle in Brushed Stainless at $31.95 (the Amazon listing is this 40 oz) among products it says it has tested repeatedly with XRF and found lead-free in all components. It recommends only the brand's non-insulated bottles and publishes no per-bottle result. Open ↗ (opens in a new tab)
- Independent Lead Safe Mama, LLC (independent advocate; earns Amazon affiliate income) January 2024
Its guide, updated January 2024, says Klean Kanteen's non-insulated adult and children's bottles tested consistently lead-free and that the paint on them is lead-free. Open ↗ (opens in a new tab)
- Independent Mamavation (a desk review of 180+ bottles from public information, not a lab test; earns affiliate income) April 2025
Lists the Klean Kanteen Wide Mouth among its best stainless steel bottles without coatings, with a screw-top lid. Open ↗ (opens in a new tab)
Who paid, and why it matters
- Independent The tester took no money from the maker for it: a consumer group, a journalist, a university or a regulator.
- Paid certification An outside lab or certifier tested or listed it, and the maker paid for that.
- Maker’s own test A lab report or certificate of analysis the maker commissioned and published.
A certification is a floor, not a verdict: it checks what its program checks and nothing else. We weigh tests by someone with no stake in the result most.
What people ask Worries raised online and elsewhere, and what we found
- Is the cap really steel? Some Klean Kanteen caps are plastic.
- Partly. The cap page (opens in a new tab) says the Wide Loop Cap is made from 18/8 stainless steel so your drink never touches plastic, and the bottle page says it has a stainless steel interior. But the maker's answer to a buyer on the 40 oz page (opens in a new tab) says it does not carry a cap for this bottle that is all stainless steel: "The core is stainless steel, though, so no plastic is touching the contents." Several buyers there describe a plastic cap with a steel lining, and a European retailer lists steel, polypropylene and silicone for it. The maker's own Plastic-Free collection (opens in a new tab) holds its all-steel Classic Steel Loop Cap and the bamboo cap, not this one. We treat the cap's outside as plastic that does not touch the drink. The Classic Loop Cap for narrow bottles is polypropylene (cap page (opens in a new tab)), so check that a listing says Wide Loop Cap.
- Can a made-in-China steel bottle carry lead?
- Lead has turned up in the vacuum sealing dot of other brands' insulated bottles (Lead Safe Mama (opens in a new tab)). This bottle is single wall and has no such dot. The maker says all its products are lead-free (FAQ (opens in a new tab)); Lead Safe Mama's tests of the brand's non-insulated bottles agree (2026 list (opens in a new tab)). Its owner replied on that list in April 2024 that the brand's insulated bottles had lead through 2017, that she has not tested a new one, and that she finds the brand's lead-free advertising misleading about the older bottles. Her tests of the single-wall bottles are the ones that apply here.
- What is the colored coating on other Klean Kanteens, and is it PFAS?
- The colored versions carry Klean Coat, which the maker's FAQ (opens in a new tab) calls a clean powder coat whose ingredients were screened with GreenScreen. We found no test of it for PFAS. The Brushed Stainless bottle we list has no coating.
- Does stainless steel leach nickel into water?
- Little does into plain water. Our water bottle guide found low metal release in lab tests, while acid raises it: a 2026 case report (opens in a new tab) tied a systemic nickel skin reaction to a steel bottle holding a citric acid solution.
- Has Klean Kanteen had a recall or a lawsuit?
- CPSC lists one recall, in 2010, for the plastic spout of a Sport Cap bottle (CPSC (opens in a new tab)). No Prop 65 notice names the company (California AG search (opens in a new tab)), and a web search found no class action over its bottles. None of this concerns this bottle.
- Is the Amazon or Walmart seller the maker, and does the warranty still apply?
- No. Pattern Professional on Amazon and Pattern on Walmart are third-party sellers. The lifetime warranty covers purchases from Klean Kanteen or authorized sellers, and its warranty page (opens in a new tab) names only Pattern's "Pattern Direct" Amazon storefront (merchant ID A3896QKF2DOVE4) and Walmart itself ("sold and shipped by Walmart.com"). The Amazon listing's seller link carries a different ID (A2O5KH22APDXN1) and the Walmart one is sold by Pattern, so we could not confirm either is covered. EarthHero shows the maker as the shipper, and the maker's own site avoids the question.
Why we chose it What put it on our list
- The drink touches steel and silicone gaskets: the bottle is 18/8 stainless steel, the cap has a stainless steel interior, and the maker says no plastic touches the contents.
- It has no vacuum seal to hide lead in, and Lead Safe Mama's X-ray checks find the brand's non-insulated bottles consistently lead-free.
- It is the lowest price per ounce of the passing steel bottles here ($31.95 for 40 oz), with a lifetime limited warranty and replaceable gaskets and caps.
Trade-offs What to weigh before you buy
- Not insulated, so it will not keep drinks cold or hot.
- The cap is not all steel by the maker's own account, and its pages disagree on what it is made of; the Reflect's bamboo cap is the all-steel option.
- No independent test of this exact model is published, and the steel grade is the maker's word with no mill certificate.
- Big: it holds 40 oz and weighs 8.6 oz empty.
- Some buyers report leaks or a gasket that falls out, and that the steel dents when dropped.
- Colored versions are powder coated; only the Brushed Stainless bottle is uncoated, and its black cap's finish is not described.
- Lead Safe Mama advises using steel bottles for water, not coffee, tea or juice.
What to know Details worth knowing first
This is the plainest large water bottle we found: one piece of 18/8 stainless steel on a wide mouth, with a loop cap that has a stainless steel interior and silicone gaskets to seal it. Klean Kanteen says your drink never touches plastic. The wide opening takes ice and is easy to clean, and our guide to reducing microplastics recommends exactly this kind of swap for plastic bottles.
The cap is the part to read carefully. The maker's cap page calls it 18/8 steel, but its answer to a buyer says no cap for this bottle is all steel and that the core is steel, and buyers describe a plastic outside with a steel lining. You drink from the steel rim with the cap off, so we scored materials a 4 rather than a 5.
It has no insulation, so there is no vacuum seal and none of the sealing dots where lead solder has turned up in other brands' insulated bottles. Lead Safe Mama, which tests with an X-ray (XRF) analyzer, has found Klean Kanteen's non-insulated bottles lead-free and lists this one, though it has not published a result for it. Buy the Brushed Stainless version if you want no coating at all, and check that the listing says Wide Loop Cap, because the brand also sells a plastic cap for its narrow bottles. Use it for water, rinse it daily, and keep acidic drinks out of it if you are sensitive to nickel.
What we checked Each claim, and how sure we are of it
| What we checked | What we found |
|---|---|
| Steel or glass inside Maker’s claim | 18/8 stainless steel, per the maker's page and FAQ. No mill certificate seen. |
| Lids that keep plastic away Not verified | The Wide Loop Cap has a stainless steel interior and silicone gaskets, and the maker says no plastic touches the contents. Its cap page calls it 18/8 steel, but the maker's Q&A says it is not all steel and buyers describe a plastic outside. You drink from the steel rim with it off. |
| No lead where you can touch it Verified | Single wall, so there is no sealing dot. Lead Safe Mama's X-ray results for the brand's non-insulated bottles and their paint are lead-free (2024, 2026), and its 2026 list links this bottle. |
| Built to last Maker’s claim | Lifetime limited warranty against defects for the original buyer from the maker or authorized sellers; gaskets and caps are sold separately. |
| Recalls and notices Verified | CPSC lists one 2010 recall of a plastic bottle spout and none for this bottle. No Prop 65 notice names Klean Kanteen (searched 2026-11-03). |
What the labels mean
- Verified We opened an independent record that confirms it: a certifier’s listing, a regulator’s list or a lab report. It is linked under Sources.
- Maker’s claim The maker says so on its own page or label. We read it but found no independent record.
- Not verified We looked and could not confirm it, or the maker does not say. Treat it as unknown.
Sources Where our facts come from
- Klean Kanteen: 40oz Wide with Loop Cap. Maker’s page. Price, size, features, warranty note and the Q&A about the cap, read 2026-11-03. Open ↗ (opens in a new tab)
- Klean Kanteen: Wide Loop Cap with Bale. Maker’s page. Says the cap is 18/8 stainless steel and that drinks never touch plastic. Open ↗ (opens in a new tab)
- Klean Kanteen: Plastic-Free collection. Maker’s page. Lists the Classic Steel Loop Cap and the bamboo cap; the Wide Loop Cap is not in it. Open ↗ (opens in a new tab)
- Klean Kanteen: Classic Loop Cap. Maker’s page. The narrow-bottle cap, made from polypropylene. Open ↗ (opens in a new tab)
- Klean Kanteen FAQ. Maker’s page. Lead-free statement, Klean Coat, steel grade, made in China, warranty. Open ↗ (opens in a new tab)
- Klean Kanteen lifetime limited warranty. Maker’s page. Names its authorized sellers on Amazon and Walmart. Open ↗ (opens in a new tab)
- Lead Safe Mama: Lead-Free Water Bottles (updated February 2026). Test report. XRF screening by an independent advocate who earns Amazon affiliate income; the owner's April 2024 replies about the brand's insulated bottles are in the comments. Open ↗ (opens in a new tab)
- Lead Safe Mama: Which water bottles and sippy cups are lead-free? (updated January 2024). Test report. Open ↗ (opens in a new tab)
- Lead Safe Mama: what a leaded sealing dot looks like. Test report. Open ↗ (opens in a new tab)
- Mamavation: Best and worst reusable water bottles (April 2025). Test report. A materials review from public information, not a lab test; the site earns affiliate income. Open ↗ (opens in a new tab)
- CPSC: Klean Kanteen recalls water bottle spouts (2010). Certifier or regulator listing. Found by searching recall titles for Klean Kanteen: one result. Open ↗ (opens in a new tab)
- California Attorney General: Prop 65 60-day notice search. Certifier or regulator listing. Searched by alleged violator on 2026-11-03; nothing named Klean Kanteen (the hits were Klean Athlete and Kleancolor, other companies). Open ↗ (opens in a new tab)
- Hayakawa and Watanabe-Okada 2026: nickel leaching from a stainless steel bottle holding citric acid (PubMed). Test report. Open ↗ (opens in a new tab)
Alternatives Other options to compare
- Klean Kanteen Reflect 27 oz with Bamboo Cap A smaller bottle whose cap is all steel with a bamboo top and no paint or plastic, about $33.
- Klean Kanteen 16 oz Pint Cup A plain steel cup with no lid, about $13.
- Hydro Flask 32 oz Wide Mouth Insulated, about $45, with a plastic cap you can take off to drink.