Klean Kanteen · Insulated Drink Tumblers
Klean Kanteen 36oz Rise Tumbler with Straw Lid
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, likely polypropylene or polyester straw 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.
Polypropylene lid and straw thermal stability
Polypropylene lids can warp, discolor, or release volatile compounds if exposed to prolonged boiling water, dishwasher cycles, or direct sunlight. Normal cold-to-warm beverage use poses minimal risk.
Straw biofilm and microbial growth
Reusable straws, especially stainless or plastic, can harbor bacteria if not thoroughly cleaned after each use. This is a maintenance issue, not a material hazard; proper hand-washing and air-drying mitigates risk.
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.
Stainless steel body integrity and sealing
18/8 stainless steel does not corrode under normal beverage use. Double-wall seals can fail with age or impact, but this affects insulation performance, not beverage safety.
Coating or finish on lid or seals
No additional coatings (silicone gaskets, rubber seals) are specified or commonly known to pose hazards on Klean Kanteen lids at normal use temperatures. Standard food-grade silicone and rubber are stable.
Aluminum leaching from lid or hardware
Product context does not indicate aluminum in the lid, straw, or hardware; stainless steel hardware is non-reactive. No leaching risk identified.
The full breakdown
What it's made of and why it matters
The Klean Kanteen Rise Tumbler body is 18/8 stainless steel, which is chemically inert and does not leach metals or degradation byproducts into beverages under normal use. The lid and straw are likely polypropylene (PP), a food-contact plastic that is stable at room temperature and mild heating but can degrade if exposed to temperatures above 100°C or prolonged direct sunlight. Stainless steel insulated tumblers have no coating to chip or delaminate, eliminating coating-related hazards common in ceramic or enamel alternatives.
The brand's record and disclosure
Klean Kanteen has publicly committed to PFAS-free manufacturing and maintains that commitment on record; this claim has not been independently verified by third-party labs but reflects a stated corporate policy. The brand has no known recalls or safety controversies specific to this product line. Klean Kanteen markets itself as a sustainability and safety-focused company, though detailed material sourcing transparency beyond PFAS statements is not routinely published.
How it compares in its category
Stainless steel tumblers like this one show lower concern for leaching and degradation issues compared with ceramic-coated or aluminum-core alternatives in the insulated drinkware category. Most competitors in this price and category segment (e.g., Hydro Flask, S'well) use similar 18/8 stainless construction and polypropylene lids, so material hazard profiles are broadly comparable. Klean Kanteen has stated its PFAS-free positioning, whereas some competitors have faced scrutiny over water-repellent coatings on lids.
If you buy it
Keep the polypropylene lid and straw away from boiling water, dishwasher heat cycles, and prolonged direct sunlight, as PP can warp or off-gas at high temperatures. Hand wash the lid and straw with warm soapy water rather than machine washing to extend their lifespan. If the lid becomes discolored, cracked, or develops an off odor, replace it; the stainless steel body is durable for years with normal care. Store dry or with minimal residual moisture to prevent any mold growth in the straw.
What we don’t know
- Basis
- Model estimate, 72% 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.