Do S'well portable water bottles have PFAS?
S'well portable water bottles average 73 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 S'well 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.
S'well portable water bottles average Good on our four-band scale. 4 of the 4 we graded are worth buying. That is above 60% of the portable water bottles brands we grade.
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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- 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.
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What S'well says and does about PFAS
S’well publishes nothing about PFAS. Its only materials and safety answer covers stainless steel, BPA and California Proposition 65 compliance, and a search of its own site returns product listings rather than any PFAS statement. Where it does name a gasket material it names silicone, on its glass bottle line. No Proposition 65 notice has been filed against the brand and we found no independent testing of its drinkware.
- Brand statementS’well says its products are made of 18/8 food-grade stainless steel that does not need a liner, that they are BPA-free, and that they comply with California Proposition 65 and FDA food contact rules. The answer does not mention PFAS or any coating chemistry. S’well ↗
- MaterialsOn its glass bottle line S’well names the lid gasket as silicone, which is not a fluorinated polymer. It does not state the gasket material for its insulated drinkware. S’well ↗
Sources checked October 1, 2026. A brand statement is the company’s own claim, which we report but have not verified. Our grades are model-based estimates, not lab tests.
S'well portable water bottles worth buying Good or better, best-graded first
- Stainless steel body, no interior coating disclosed
- Stainless steel corrosion and nickel leaching, 18/8 stainless steel can release trace nickel in acidic or…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel body, plastic/silicone lid and cap
- Silicone/plastic lid bacterial growth and contamination. The plastic or silicone lid and cap can harbor…
2 hazards checked on this product, all on its full breakdown.
- Activated carbon and coconut shell filter media
- Bacterial growth if unmaintained. Activated carbon filters create high-surface-area environments for…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel double wall with vacuum insulation
- BPA & bisphenols. The bottle cap is made of plastic, and S'well does not publicly specify the resin type or…
Better portable water bottles from other brands
Graded higher than the S'well average of 73.
- 18/8 stainless steel, no interior coating
- The brand calls it PFAS-free, which we have not verified
- Cap or closure contamination
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
- Stainless steel body, no coating disclosed
- We found no PFAS statement from the brand
- Bacterial or mold growth in storage
3 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. S'well averages 73.
See every S'well product we grade on the S'well brand page, or the full portable water bottles ranking.