Do Klean Kanteen portable water bottles have PFAS?
Klean Kanteen portable water bottles average 96 out of 100 on PFAS Authority's PFAS and toxin screen across the 10 Klean Kanteen portable water bottles graded as of October 2026, above the 70 out of 100 median for the 15 other portable water bottles brands graded alongside it.
Klean Kanteen portable water bottles average Excellent on our four-band scale. 10 of the 10 we graded are worth buying.
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.
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Top-graded picks in the categories readers replace first, every one scored on the same rubric.
- polypropylene filter housing, carbon/sediment cartridge
- We found no PFAS statement from the brand
- Bacterial growth in spent cartridges
3 hazards checked on this product, all on its full breakdown.
Aquasure
Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System
- RO membrane, carbon filters, stainless steel housing
- We found no PFAS statement from the brand
- Bacterial and microbial growth in housing and filters
4 hazards checked on this product, all on its full breakdown.
Avocado
Vegan Mattress
- organic cotton, natural latex, coconut coir, recycled steel coils
- The brand calls it PFAS-free, which we have not verified
- Heavy metals
2 hazards checked on this product, all on its full breakdown.
Klean Kanteen portable water bottles worth buying Good or better, best-graded first
- 18/8 stainless steel, no interior coating
- The brand calls it PFAS-free, which we have not verified
- Cap or closure contamination. The Loop Cap material composition is not specified in available context. If the…
2 hazards checked on this product, all on its full breakdown.
- stainless steel body, foam insulation, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Cap gasket and seal contamination. Rubber or silicone gaskets can degrade over time or harbor bacterial…
- Stainless steel bottle, plastic flip cap
- The brand calls it PFAS-free, which we have not verified
- Plastic cap degradation and microplastic shedding. The flip cap experiences mechanical stress from repeated…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, bamboo cap
- The brand calls it PFAS-free, which we have not verified
- Bacterial or mold growth in bamboo cap. Bamboo is a porous natural material that can harbor bacteria or mold…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel body, plastic cap
- The brand calls it PFAS-free, which we have not verified
- Microplastics. The polypropylene or polyethylene-based cap may degrade very slowly with UV exposure or…
2 hazards checked on this product, all on its full breakdown.
- stainless steel bottle with powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation. Baked polymer coatings can chip or crack from impact or abrasion. Once…
- 18/8 stainless steel body, thermoplastic cap
- The brand calls it PFAS-free, which we have not verified
- Thermoplastic cap degradation and leaching. Thermoplastic caps can soften, discolor, or leach residual…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, activated carbon filter
- The brand calls it PFAS-free, which we have not verified
- Activated carbon filter maintenance and microbial growth. If the filter is not replaced on schedule or stored…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle with reflective coating (paint-based)
- The brand calls it PFAS-free, which we have not verified
- Paint coating degradation and flaking. The reflective paint coating may chip or peel with heavy use, UV…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel body, silicone/plastic components
- The brand calls it PFAS-free, which we have not verified
- Silicone thermal stability (cap/gasket components). Silicone gaskets and the Loop Cap can degrade or off-gas…
2 hazards checked on this product, all on its full breakdown.
The same question, asked of the other portable water bottles brands
Best average grade first. Klean Kanteen averages 96.
See every Klean Kanteen product we grade on the Klean Kanteen brand page, or the full portable water bottles ranking.