Klean Kanteen Review, Is Klean Kanteen Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 12 graded products, Klean Kanteen averages Excellent (94/100). On disclosure, the brand says nothing publicly about PFAS. 12 of its products grade Good or better. Grades are model-based estimates, not lab results.
Does Klean Kanteen have PFAS, by category
Worth buying from Klean Kanteen Good or better, safest first
Klean Kanteen
Lunch Food Box
stainless steel with bamboo fiber lid
Bamboo fiber lid degradation or contaminant absorption
Bamboo fiber is a natural material that can absorb moisture and odors over time. If the…
Gasket or seal material composition
The lid seal material is not explicitly detailed in public product documentation. If…
Formaldehyde / VOCs
Bamboo fiber processing may involve formaldehyde-based resin binders or chemical…
Lower concern. Stainless steel construction with strong brand commitment to PFAS avoidance.
✓Verified PFAS-free by a third party
Klean Kanteen
27oz Wide Water Bottle with Loop Cap
18/8 stainless steel, no interior coating
Nickel leaching from stainless steel
18/8 stainless steel contains 8% nickel. Leaching is minimal in neutral pH water but…
Surface corrosion and pitting over time
Prolonged contact with chlorinated water, salt water, or acidic beverages can cause…
Bacterial growth in cap seals
The loop cap design may trap moisture or residue in crevices. Inadequate drying or…
Lower risk; bare stainless steel water bottle with no coatings.
✓Bare metal or glass, no coating at all
Klean Kanteen
Rise Classic Insulated Water Bottle
stainless steel body, foam insulation, stainless steel cap
Stainless steel nickel leaching
Food-grade stainless steel (18/8) contains nickel, which can leach in trace amounts if…
Cap seal degradation and bacterial growth
The stainless steel cap includes a silicone or rubber seal that can crack, degrade, or…
Lower risk from bare stainless steel without PFAS coatings.
✓Bare metal or glass, no coating at all
Klean Kanteen
Hydration Kit
Stainless steel bottle, activated carbon filter
Bacterial growth in filter cartridge if unmaintained
Activated carbon filters provide a moist, nutrient-poor environment that discourages most…
Incomplete contaminant removal (effectiveness, not toxicity)
Activated carbon does not remove heavy metals, fluoride, or microbes. If your water…
Low risk, stainless steel and carbon are inherently PFAS-free materials.
✓Naturally PFAS-free material
Klean Kanteen
Rise Reflect with Bamboo Cap
Stainless steel bottle, bamboo cap
Bacterial growth in cap seals
The bamboo cap and any rubber or silicone seals can harbor bacteria if not dried…
Lower risk; stainless steel and bamboo lack typical PFAS exposure pathways.
⚠Brand says nothing about PFAS
Klean Kanteen
Classic Flip Seal Sport Cap
Stainless steel bottle, plastic flip cap
Plastic cap degradation and microparticles
Polypropylene caps can degrade under repeated hot fill, UV exposure, or mechanical…
Cap seal/gasket off-gassing or contamination
Flip seal caps may contain elastomeric seals or adhesives not fully disclosed. No…
Bacterial growth in cap crevices
The flip mechanism creates narrow channels where moisture and bacteria can accumulate if…
Lower risk without PFAS-typical protective coatings.
⚠Brand says nothing about PFAS
Klean Kanteen
64 oz Wide Water Bottle with Loop Cap
Stainless steel body, plastic cap
BPA & bisphenols
Cap material is not specified; if polycarbonate or recycled plastic, BPA or BPS could…
Cap degradation over time
Plastic caps can crack, cloud, or leach polymer fragments after repeated washing and use.…
Lower risk; stainless steel core is inherently PFAS-free, cap material unspecified.
⚠Brand says nothing about PFAS
Klean Kanteen
Water Bottle Insulated Classic Loop Cap
Stainless steel body, silicone/plastic components
Silicone gasket degradation and odor retention
Silicone is chemically inert but can absorb color and odor from beverages (especially…
Plastic cap latch and hinge brittleness
The plastic Loop Cap closure may become brittle or crack after repeated freezing cycles…
Bacterial or mold growth inside bottle
Any reusable bottle can harbor bacteria or mold if not dried completely between uses or…
Low risk stainless steel bottle with no identified PFAS concerns.
⚠Brand says nothing about PFAS
Klean Kanteen
16oz Rise Classic with Flip Seal Sport Cap
18/8 stainless steel body, thermoplastic cap
Thermoplastic cap degradation and leaching
Repeated heat exposure, dishwasher use, or prolonged contact with acidic beverages may…
Bacterial growth or biofilm in cap seal
The Flip Seal Sport Cap mechanism may trap moisture in the closure channel if not…
Lower risk; stainless steel bottle with no confirmed PFAS coatings.
⚠Brand says nothing about PFAS
Klean Kanteen
Meal 34oz Food Box
stainless steel container with glass or ceramic lid
Ceramic or glass lid degradation
Ceramic lids may develop micro-cracks or glaze wear over time from repeated thermal…
Gasket or seal leachables
Lids typically use silicone or rubber gaskets to ensure an airtight seal. Most commercial…
Lower concern. Stainless steel food box lacks known PFAS triggers.
⚠Risky category by default
Klean Kanteen
Rise Food Meal Box
Stainless steel container, food-grade silicone lid
Silicone elastomer degradation
Food-grade silicone is stable at room temperature and mild heating but can degrade…
Lower concern. Stainless steel and silicone are inherently PFAS-resistant materials.
⚠Risky category by default
Klean Kanteen
Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid
Stainless steel body, silicone gasket lid seal
Silicone gasket degradation
Repeated dishwasher cycles or high heat exposure may cause silicone to crack or harden…
Bacterial growth in seal crevices
If gasket is not dried thoroughly after washing or if the container sits filled for…
Lower concern. Food-contact stainless steel has no inherent PFAS need.
⚠Risky category by default
Every grade uses the same public rubric. How grades work →