Do S'well insulated travel mugs have PFAS?
S'well insulated travel mugs average 73 out of 100 on PFAS Authority's PFAS and toxin screen across the 7 S'well insulated travel mugs graded as of October 2026, above the 70 out of 100 median for the 9 other insulated travel mugs brands graded alongside it.
S'well insulated travel mugs average Good on our four-band scale. 7 of the 7 we graded are worth buying. That is above 83% of the insulated travel mugs 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.
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 insulated travel mugs worth buying Good or better, best-graded first
S'well
Recycled Stainless Steel Explorer 24oz Green Jasper
- Recycled stainless steel, no coating disclosed
- Bacterial growth in seams or caps, The bottle's gasket, lid interior, and seams may harbor bacteria if not…
S'well
40 oz Stainless Steel Traveler
- 18/8 stainless steel interior and exterior, plastic lid components
- BPA & bisphenols, S'well does not disclose the specific plastic resin or additive chemistry of the lid. While…
3 hazards checked on this product. See all of them.
S'well
Mug Pink
- Stainless steel double-wall vacuum insulated
- Nickel leaching from stainless steel, 18/8 stainless contains 8% nickel. While FDA-approved for food contact…
3 hazards checked on this product. See all of them.
S'well
S'ip by S'well Takeaway Mug
- Stainless steel exterior, insulated
- BPA & bisphenols, S'well states products are BPA-free, but independent lab confirmation of all interior…
3 hazards checked on this product. See all of them.
S'well
S'ip by S'well Travel Mug
- Stainless steel with plastic lid components
- BPA & bisphenols, S'well does not disclose lid polymer type or BPA-free status; most commodity polypropylene…
3 hazards checked on this product. See all of them.
S'well
24oz Tumbler with Straw
- Stainless steel double-wall with plastic lid and straw
- BPA & bisphenols, Polypropylene lids and straws may contain trace additives (including plasticizers or UV…
4 hazards checked on this product. See all of them.
S'well
Vacuum Insulated Travel Mug with Handle
- Stainless steel body, plastic handle and cap
- Plastic cap/handle thermal migration, Polypropylene handles and caps may release trace amounts of oligomers…
4 hazards checked on this product. See all of them.
Better insulated travel mugs from other brands
Graded higher than the S'well average of 73.
Owala
FreeSip Sway Stainless Steel
- Stainless steel body, no interior coating disclosed
- Silicone and plastic lid/valve leachables
3 hazards checked on this product. See all of them.
Owala
Stainless Steel Straw Tumbler Route 66
- Stainless steel tumbler, bare uncoated
- Coating degradation and microplastic shedding from exterior print
3 hazards checked on this product. See all of them.
Thermos
18 oz. Icon Vacuum Insulated Stainless Steel Mug
- stainless steel exterior, vacuum insulation, stainless steel interior
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel
3 hazards checked on this product. See all of them.
The same question, asked of the other insulated travel mugs 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 insulated travel mugs ranking.