Klean Kanteen · Insulated Drink Tumblers
Klean Kanteen Rise Tumbler
Brand PFAS statement on record, which we have not verified.
Klean Kanteen describes its bottles as BPA, PFAS and lead-free. We record that as an unverified brand claim.
Brand says: “Klean Kanteen describes its bottles as BPA, PFAS and lead-free.”
We flunk more products than we pass. This one earned its grade. How we grade
Material
18/8 stainless steel body, likely stainless steel or silicone lid
Brand disclosure
Brand claims PFAS-free
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
Nickel leaching from stainless steel
18/8 stainless steel can release trace nickel in acidic beverages over prolonged contact, though the amount is typically negligible and well below regulatory limits. Individuals with severe nickel dermatitis should be aware of this risk, though ingested nickel exposure is not considered a primary health concern for most users.
Silicone lid degradation
If the lid is silicone, repeated heating and cooling cycles may cause minor material breakdown over years of use. No known leaching of harmful chemicals from food-grade silicone in Klean Kanteen products, but visual wear should trigger replacement to maintain seal integrity.
What’s reassuring
Brand-stated PFAS-free
The brand states this product is PFAS-free. We have not verified the claim.
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Coating or seal integrity on lid
No information on record indicates that the lid has a fluorinated or problematic coating. If the lid is stainless steel, no coating concerns apply; if silicone, food-grade silicone is not known to have embedded PFAS in this brand's products based on available disclosure.
Thermal burn risk (product design, not chemistry)
This is a functional design feature (insulated walls maintain hot liquid temperature) rather than a safety failure. Normal beverage-ware precautions apply; the tumbler does its job of keeping drinks hot.
Heavy metals
Stainless steel has no glaze or ceramic coating, and no decorative lead-based or cadmium-based finishes are documented for this product. Any printing or coloring on the exterior does not contact beverage.
Source, FDA ↗The full breakdown
What it's made of and why it matters
The Rise Tumbler body is 18/8 stainless steel (18% chromium, 8% nickel), an alloy specifically chosen for corrosion resistance and non-reactivity with acidic and alkaline liquids. Stainless steel does not leach heavy metals, BPA, or other endocrine disruptors under normal use. The lid is either stainless steel or silicone; neither material poses leaching hazards at typical beverage temperatures. This material profile avoids the primary failure modes of alternative drink ware (aluminum oxidation, ceramic glaze lead, plastic polymer breakdown).
The brand's record and disclosure
Klean Kanteen has marketed itself as a PFAS-free brand and maintains a public stance against "forever chemicals" in food-contact products. The brand does not appear in major safety recall databases for this product line. However, the PFAS claim is stated by the brand itself and has not been independently verified by third-party testing or certification bodies on record. No significant controversies or pattern of safety complaints are documented for this product.
How it compares in its category
Insulated tumblers typically use either plastic liners (BPA/BPS/microplastic risk when hot beverages are added), aluminum (leaching under acidic conditions), or stainless steel (lower concern for these specific chemical leaching risks). The Rise Tumbler's all-stainless construction puts it in the higher-safety tier of the category, comparable to other premium stainless steel tumblers. Brand-level PFAS transparency is better than many mass-market competitors that do not disclose fluorinated coating status.
If you buy it
Stainless steel is durable and does not require special care beyond normal washing. Avoid abrasive scrubbers that may scratch the exterior, though scratches do not compromise safety. The silicone or steel lid should be inspected periodically for wear; replace if cracks develop. Stainless steel maintains integrity indefinitely if not dented; no coating degradation or replacement cycle is needed.
What we don’t know
- Basis
- Model estimate, 78% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Klean Kanteen has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
More insulated drink tumblers grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.