Klean Kanteen · Insulated Drink Tumblers
Klean Kanteen 16oz 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
Stainless steel body, powder-coat finish
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.
Powder-coat finish degradation
The exterior powder coat can chip or scratch with impact or repeated dishwashing. Cosmetic degradation poses no toxicity risk, but exposed bare steel edges are sharp hazards. Monitor coating integrity, especially at the rim and base.
Seal degradation and microbial growth
Double-wall insulation seals can fail over time, allowing liquid to accumulate in the cavity. Stagnant liquid in sealed spaces promotes bacterial and mold growth, which is a hygiene concern rather than a material toxicity issue. Regular inspection and prompt replacement if leaking is essential.
Thermal shock to seals
Rapid temperature changes (e.g., hot liquid followed immediately by ice water) can stress the seals and insulation layer. Gradual temperature exposure is recommended to extend seal life and prevent separation of the double walls.
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.
Metal leaching from stainless steel
18/8 stainless steel does not leach nickel or chromium into beverages under normal room-temperature use. No reported incidents exist for this product or material class at typical drink temperatures.
Formaldehyde / VOCs
Modern powder-coat finishes are typically epoxy or polyester-based and are cured at the factory. Off-gassing risk is minimal because the coating is inert once cured and does not contact the beverage. No specific VOC emissions data is publicly available for this product.
Source, ATSDR ↗The full breakdown
What it's made of and why it matters
The Klean Kanteen Rise Tumbler uses a 18/8 stainless steel body (chromium-nickel alloy) with a powder-coat finish on the exterior. Stainless steel is chemically inert and does not leach metals into beverages under normal conditions because the chromium oxide surface layer acts as a barrier. The powder coat is a dry finish applied electrostatically and cured, which creates a durable non-solvent layer that does not contact liquids inside the tumbler. The interior is food-grade stainless steel with no additional coating.
The brand's record and disclosure
Klean Kanteen has published a PFAS-free claim and positions itself as a plastic-alternative brand focused on durable, non-toxic materials. The brand does not appear in major product safety recalls or regulatory enforcement actions on record. However, the PFAS-free claim has not been independently verified by third-party lab testing in publicly available reports. Klean Kanteen does not routinely publish full material safety data sheets or third-party certifications (such as NSF or BPA-free certification) for this specific model.
How it compares in its category
Insulated tumblers typically use either stainless steel, plastic liners, or both. This model avoids plastic food-contact surfaces entirely, which removes risks from BPA, BPS, or phthalate leaching that plague many competitor tumblers. Compared to ceramic-lined tumblers, stainless steel eliminates concerns about lead or cadmium in glazes. Powder-coated stainless steel tumblers are among the lower-hazard options in the category, though the exterior finish durability depends on impact resistance.
If you buy it
Hand wash recommended to preserve the powder-coat finish; dishwashers may dull or degrade the exterior coating over years of use. Do not expose to sustained temperatures above 160°F (71°C) as the double-wall seal integrity may be compromised at extreme heat. If the powder coat chips or flakes significantly, discontinue use of that tumbler as the exposed metal edges pose a sharp injury risk, not a chemical hazard. Replace if seals degrade and liquid leaks into the insulation cavity, which promotes mold growth.
What we don’t know
- Basis
- Model estimate, 82% 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.