18/8 food-grade stainless steel interior — no plastic liner, no BPA, no coating that degrades. Research shows plastic bottles can release up to 240,000 microplastic particles per liter. Read more in our water bottle guide.

Reusable straws in 18/8 stainless steel with removable silicone tips. Klean Kanteen states the steel is certified 90 percent post-consumer recycled.
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Steel tube, silicone tip. Silicone is not a plastic in the sense that matters here: it is a cured silicon-oxygen elastomer with no plasticizers to migrate, which is why it is the standard material for baby bottle nipples and medical tubing.
What these are made of: recycled stainless steel and silicone. No plastic, no coating, no lining.
Avoid single-use plastic straws, and be wary of the "compostable" plastic straws that replaced them — most require an industrial composting facility that your city probably does not have. Also worth knowing: paper straws have been found to carry PFAS coatings, so the disposable swap was not the clean answer it looked like.
Straight answer: we're a research team, not a testing lab. Here's exactly what our rating is based on — and what it isn't — so you can weigh it honestly.
Anything that adds a known microplastic, PFAS, or off-gassing source — a non-stick coating, a plastic surface against food or skin, vinyl/PVC — is downgraded or cut. We only list what clears that bar.
18/8 food-grade stainless steel interior — no plastic liner, no BPA, no coating that degrades. Research shows plastic bottles can release up to 240,000 microplastic particles per liter. Read more in our water bottle guide.
Six-pack of 18/8 stainless straws with removable silicone tips — the household size, so there is always a clean one and nobody reaches for a disposable.
Platinum-grade silicone rated to 400°F. Unlike plastic zip bags, pure silicone doesn't shed microplastics. Dishwasher, microwave, and freezer safe.
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