Which insulated bottles contain no plastic, cap and seal included?
Two insulated bottles make the list, both Bronze: Klean Kanteen's brushed Insulated TKPro 16 oz and its Rise Reflect 20 oz with the bamboo cap. Both are steel with a silicone seal in the cap, and the seal is the Bronze. Nothing here has earned Gold or Silver. We've checked four insulated bottles; the other two are below.
A silicone seal is allowed here and not in water bottles for one reason: a cap on a hot drink has to take the heat, and we haven't found an insulated bottle that seals with anything else. In water bottles a glass bottle seals with natural rubber, so there silicone isn't needed. Bronze is as high as a silicone seal goes.
The TKPro is a steel bottle with a steel cup and a steel cap, bare brushed finish only; the painted colors wear a powder coat, which is plastic. Two silicone gaskets seal the cap. We don't know what else is inside the cap, or what the logo, the base cap and the vacuum plug are made of, and the maker hasn't said. Klean Kanteen has pulled its own page and US stock is gone; a UK shop has it.
The Rise Reflect 20 oz is a double-wall steel body with a bamboo cap, no paint, and one silicone seal in the cap. We don't know how the bamboo is finished, what joins it to the steel, or what the logo and the base cap are made of. One reviewer says the cap handle pulls off if it gets bent, and the maker hasn't said what the handle is made of.
What didn't make it. Ocemida's H2Stash 1 L is steel inside, outside and in the cap apart from one silicone gasket, which alone would be a Bronze. The carry loop on the cap is the part nobody describes, and the maker's page showed it sold out when we looked. Life Without Plastic's 680 ml seconds bottle is gone from the shop, so there is nothing to rate or buy.
What would beat them: an insulated bottle that holds a hot drink and seals with natural rubber or with nothing at all. Once one like that checks out, silicone is no longer needed in this category, and these two come off the list. We haven't found one.
Side by side
Every insulated bottle we checked, the listed ones first and in rank order. The full evidence for each is one click away.
| Rank | Photo | Materials | Packaging | Price seen | The catch |
|---|---|---|---|---|---|
| Listed, in rank order | |||||
| 1 |  | Klean Kanteen Insulated TKPro 16 oz (Brushed Stainless) Bronze | |||
| 18/8 stainless steel, double-wall vacuum, double-wall stainless steel, stainless steel, bare brushed stainless, no coating; 4 minor parts unverified | Not verified yet | £38.95seen November 1, 2026 | Two silicone gaskets inside the cap, not one. Brushed Stainless only; the painted colors carry a plastic powder coat. Unknown so far: what else is inside the cap, the logo, the base cap, and the vacuum plug and welds. The maker's own page returns an error and US sellers are sold out; Babipur (UK) sells it at GBP 38.95. Packaging not checked. | ||
| 2 | Klean Kanteen Rise Reflect 20 oz with Bamboo Cap Bronze | ||||
| 18/8 stainless steel, 90% post-consumer recycled, sustainably harvested bamboo, none stated; 7 minor parts unverified | Not verified yet | $44.95seen November 6, 2026 | One silicone seal in the cap. Unknown so far: the finish on the bamboo, the glue or fixing between bamboo and steel, the logo, the base cap, the cap handle and the vacuum plug. Packaging not checked. The maker's page shows it in stock; one US shop lists it sold out and another wouldn't load for us. | ||
| Checked, not listed | |||||
| Life Without Plastic Less Than Perfect vacuum insulated stainless steel bottle, 680 ml / 23 oz Not listed | |||||
| stainless steel | Not verified yet | Not linked | cap gasket: food-grade silicone | ||
 | Ocemida H2Stash 1 L vacuum insulated stainless steel bottle Cannot tell | ||||
| 316L stainless steel, 304 stainless steel, 316L stainless steel, hollow | Not verified yet | Not linked | cap gasket: food-grade silicone | ||
The list
Photo: Klean Kanteen (babipur.co.uk) 1
Klean Kanteen Insulated TKPro 16 oz (Brushed Stainless)
Bronze
A steel bottle with a steel cap and a steel cup, and nothing else we can find that you'd call plastic. The catch is the seal: two silicone rings inside the twist-and-pour cap. That's what makes it Bronze. It's the brushed finish only; every painted TKPro wears a plastic powder coat. We don't yet know what else is inside the cap, or what the logo, the base cap and the vacuum plug are made of, and Klean Kanteen hasn't said. The maker's own page is gone and US sellers are sold out, so for now the live seller is Babipur in the UK.
- Materials
- 18/8 stainless steel, double-wall vacuum, double-wall stainless steel, stainless steel, silicone, bare brushed stainless, no coating; 4 minor parts still unverified
- Packaging
- Not verified yet
- Price seen
- £38.95 on November 1, 2026
- Caveat
- Two silicone gaskets inside the cap, not one. Brushed Stainless only; the painted colors carry a plastic powder coat. Unknown so far: what else is inside the cap, the logo, the base cap, and the vacuum plug and welds. The maker's own page returns an error and US sellers are sold out; Babipur (UK) sells it at GBP 38.95. Packaging not checked.
2
Klean Kanteen Rise Reflect 20 oz with Bamboo Cap
Bronze
A double-wall steel bottle with a bamboo cap, and no paint on any of it. The one synthetic part is a food-grade silicone seal in the cap, and that's the Bronze. Klean Kanteen says there's no plastic in it, and we haven't found any. Still open: how the bamboo is finished, what joins it to the steel, how the logo is marked, and what the base cap is made of. A reviewer says the handle on the cap can pull off if it gets bent. The maker hasn't said.
- Materials
- 18/8 stainless steel, 90% post-consumer recycled, sustainably harvested bamboo, food-grade silicone, none stated; 7 minor parts still unverified
- Packaging
- Not verified yet
- Price seen
- $44.95 on November 6, 2026
- Caveat
- One silicone seal in the cap. Unknown so far: the finish on the bamboo, the glue or fixing between bamboo and steel, the logo, the base cap, the cap handle and the vacuum plug. Packaging not checked. The maker's page shows it in stock; one US shop lists it sold out and another wouldn't load for us.
Buy from kleankanteen.com$44.95Every component, with sources
Where plastic hides in insulated bottles
A vacuum bottle is two steel walls with a vacuum between them, and the steel is rarely the problem. The plastic is in what closes it. Every insulated bottle we checked that names its seal names silicone. That matters for a bottle meant to hold hot drinks: Parker's O-ring handbook rates standard natural rubber to about 70 °C in dry heat and silicone to about 204 °C, and Weck, which still seals its jars with natural rubber, tells owners to wash the rings by hand because dishwasher detergent dry-rots them. Past the gasket, look at the cap itself, the plug that closes the vacuum on the base, and the powder coat on painted colors, which is a plastic.
Some of these products seal with silicone. Whether silicone counts as plastic, and where we let it in: Is silicone plastic?
What to check before you buy
- Cap: solid steel, or a plastic core with a steel face?
- Seal: one silicone gasket, two, or a natural rubber or steel-to-steel seal?
- Base: is the vacuum port closed with a glass, silica or steel plug, or a plastic or rubber cap?
- Finish: bare or brushed steel, or a powder coat on a painted color?
- Lid parts you drink from: a steel cup or spout, or a plastic sip lid or straw?
- Packaging: card and paper, or a plastic sleeve?
Checked and not listed
- Life Without Plastic Less Than Perfect vacuum insulated stainless steel bottle, 680 ml / 23 oz
Not listedThis was a seconds listing, and it is gone. The product page returns a 404 and we found no shop selling this 680 ml bottle new, so there is nothing to rate or buy. What Life Without Plastic says about its bottles in general is steel inside and out, with a small food-grade silicone ring inside the cap. That blog post names no size, so we can't tie it to this bottle.
- Ocemida H2Stash 1 L vacuum insulated stainless steel bottle
Cannot tellSteel all the way through, by the maker's count: 316L inside, 304 outside, a hollow steel cap and a steel infuser. The one non-metal part it owns up to is a silicone gasket, and that alone would be a Bronze. Ocemida argues silicone isn't plastic; we count it as the single allowed exception. What keeps the bottle off the list is the carry loop on the cap. You pick the bottle up by it. Nobody says what it is made of. One line on the page mentions a stainless handle, but the loop owners describe is never specified. It all rests on the maker's word. Right now the page reads "Sold out. Preorders open."
Questions people and agents ask
- Why do the insulated bottles on this list have a silicone seal?
- We count silicone as plastic, so a silicone seal keeps a bottle at Bronze. We allow it here because a cap on a hot drink has to take the heat, and we haven't found an insulated bottle that seals with anything else. In water bottles, where a glass bottle seals with natural rubber, silicone-sealed bottles aren't listed. The long answer: Is silicone plastic?
- Is there an insulated bottle with no plastic at all?
- Not that we've found. The two we list are Bronze because each has a silicone seal in the cap. A vacuum bottle that holds a hot drink and seals with natural rubber, or with nothing, would beat both.
- Do painted insulated bottles count?
- No. Klean Kanteen's own FAQ says its Klean Coat finish, "on our products with colors and prints," is "a clean powder coat," and a powder coat is plastic. Only a bare or brushed steel finish can be listed.