Klean Kanteen Classic with Steel Loop Cap
The plain Klean Kanteen Classic bottle paired with the all-steel Loop Cap - the drink touches only 18/8 stainless, sealed by a single replaceable silicone gasket.
The verdict: Silicone only
The Classic bottle is 18/8 stainless steel, and the All Stainless Steel Loop Cap is a one-piece 18/8 stainless cap, threads included. Klean Kanteen markets it as a "100% stainless environment" inside the bottle, and the surface your drink touches is indeed all steel - but the cap is not gasket-free: it seals on a single replaceable silicone gasket, and Klean Kanteen sells replacement gaskets for it. So the honest rating is silicone-only - steel everywhere except that one silicone sealing ring, which is about as little non-metal as a leakproof cap gets. Applies to the adult Classic and the Kid Classic body, both narrow-mouth internal-thread.
The Classic body and this one-piece stainless Loop Cap are sold separately; together they make an all-steel drink surface sealed by a single silicone gasket (silicone-only).
What it's made of
| Part | Material | Water contact |
|---|---|---|
| bottle body 18/8 (304) food-grade stainless; 90% post-consumer recycled on most Classic sizes | Stainless Steel 304 / 18-8 | Yes primary |
| cap (All Stainless Steel Loop Cap, one-piece) one piece of 18/8 stainless including the threads; the drink-facing interior is all steel | Stainless Steel 304 / 18-8 | Yes primary |
| cap gasket single replaceable silicone sealing ring inside the cap - the only non-metal part; Klean Kanteen sells replacements | Silicone | Yes seal |
The Classic is Klean Kanteen's original narrow-mouth single-wall bottle, made since 2004 and sold in everything from 12oz to 64oz. You drink straight from the opening - it's an open-mouth bottle, no straw or spout. The all-steel Loop Cap fits the narrow-mouth Classic and the Kid Classic body alike, so it's the plastic-free-purist pick for both adults and kids who don't need a spill-proof spout.
Pros
- One-piece steel cap, dishwasher safe; the only wear part is a cheap replaceable gasket
- Same cap fits adult Classic and Kid Classic bodies
- About as close to all-metal as a leakproof cap gets
Cons
- Standard Classic ships with a plastic loop cap; the steel cap is a separate purchase
- Open-mouth drinking only - no straw or spill-proof spout, so less kid-friendly for toddlers
- Not intended for hot beverages
- The silicone gasket can wear or loosen over time (it is replaceable)
Notes
- The All Stainless Steel Loop Cap fits Classic narrow-mouth bottles (internal threads) only, not wide-mouth
- Wide-mouth Classic/TKWide bodies use a different loop cap (Wide Loop Cap with Bale), also sealed on silicone
- Popping the gasket out gives a fully steel path, but you lose the leakproof seal
Common questions
Does the Klean Kanteen Classic with Steel Loop Cap have plastic in it?
No petroleum plastic touches your water. On the Klean Kanteen Classic with Steel Loop Cap, the cap gasket is silicone, and the rest of the water path is stainless steel.
What is the Klean Kanteen Classic with Steel Loop Cap made of?
Part by part, the Klean Kanteen Classic with Steel Loop Cap is: bottle body — stainless steel; cap (All Stainless Steel Loop Cap, one-piece) — stainless steel; cap gasket — silicone.
Does the Klean Kanteen Classic with Steel Loop Cap contain lead?
No detectable lead was found in the Klean Kanteen Classic with Steel Loop Cap. That finding comes from independent lab (XRF) testing, not a manufacturer claim.
Does the Klean Kanteen Classic with Steel Loop Cap have silicone in it?
Yes — the cap gasket is silicone on the Klean Kanteen Classic with Steel Loop Cap. It is a seal rather than a surface your water sits against, which is stainless steel.
Is the Klean Kanteen Classic with Steel Loop Cap BPA-free?
No plastic touches your water on the Klean Kanteen Classic with Steel Loop Cap — the water path is stainless steel and silicone — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Where is the Klean Kanteen Classic with Steel Loop Cap made?
The Klean Kanteen Classic with Steel Loop Cap is made in China.
Categories: Water Bottles · Kids Water Bottles
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://www.kleankanteen.com/products/stainless-loop-cap Klean Kanteen markets the Steel Loop Cap as one piece of 18/8 stainless creating a "100% stainless environment"; the marketing does not claim it is gasket-free, and the cap seals on a replaceable silicone gasket
- retailer https://www.amazon.com/Klean-Kanteen-Stainless-Bottle-Replaceable/dp/B0083F0RKM listing title is "All Stainless Steel Loop Cap ... Leak Proof Water Bottle Cap with Replaceable Gasket" - confirms the all-steel cap seals on a replaceable silicone gasket, not steel-on-steel
- manufacturer https://www.kleankanteen.com/collections/maintenance-kits Klean Kanteen sells replacement gaskets/maintenance kits for its caps, confirming the Steel Loop Cap relies on a silicone gasket
- review https://www.bottlepro.net/hydration-blog/which-water-bottles-completely-avoid-plastic editorial roundup notes Klean Kanteen loop caps keep plastic out of the water path; the only non-steel part is the silicone seal
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.