Do Thermos insulated travel mugs have PFAS?
Thermos insulated travel mugs average 79 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Thermos insulated travel mugs graded as of October 2026, above the 71 out of 100 median for the 10 other insulated travel mugs brands graded alongside it.
Thermos insulated travel mugs average Excellent on our four-band scale. 8 of the 8 we graded are worth buying. That is above 90% 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.
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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.
Thermos insulated travel mugs worth buying Good or better, best-graded first
- stainless steel exterior, vacuum insulation, stainless steel interior
- We found no PFAS statement from the brand
- Nickel leaching from stainless steel, 18/8 stainless steel does contain nickel (up to 8%). Under normal use…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel (uncoated)
- We found no PFAS statement from the brand
- Bacterial growth in storage. If stored wet or with residual liquid for extended periods, stainless steel can…
- stainless steel, no stated coating
- We found no PFAS statement from the brand
- Seam or lid leachables. The lid may contain polymer components (silicone gaskets, plastic valve mechanisms)…
2 hazards checked on this product, all on its full breakdown.
- stainless steel interior, plastic exterior
- We found no PFAS statement from the brand
- Plastic exterior degradation and leachates. The exterior plastic shell contacts only air and hands, not…
3 hazards checked on this product, all on its full breakdown.
- stainless steel, no stated interior coating
- We found no PFAS statement from the brand
- Seal degradation and bacterial growth. The rubber gasket or silicone seal can degrade after 3-5 years of…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel interior, BPA-free plastic exterior
- We found no PFAS statement from the brand
- Plastic exterior degradation and microplastic shedding. The outer plastic shell can crack, peel, or degrade…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel interior and exterior, plastic lid
- We found no PFAS statement from the brand
- Plastic lid polymer degradation. Repeated dishwasher cycles or exposure to very hot liquids can degrade the…
3 hazards checked on this product, all on its full breakdown.
- Stainless steel interior, foam insulation outer shell
- We found no PFAS statement from the brand
- Foam insulation degradation. Polyurethane and polystyrene foams can break down over years of use, especially…
3 hazards checked on this product, all on its full breakdown.
Better insulated travel mugs from other brands
Graded higher than the Thermos average of 79.
- stainless steel exterior, ceramic lining interior
- Ceramic coating degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, plastic lid
- We found no PFAS statement from the brand
- Plastic lid polymer identity and leaching potential
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, no interior coating disclosed
- Silicone and plastic lid/valve leachables
3 hazards checked on this product, all on its full breakdown.
The same question, asked of the other insulated travel mugs brands
Best average grade first. Thermos averages 79.
See every Thermos product we grade on the Thermos brand page, or the full insulated travel mugs ranking.