Do Hydro Flask insulated travel mugs have PFAS?
Hydro Flask insulated travel mugs average 70 out of 100 on PFAS Authority's PFAS and toxin screen across the 8 Hydro Flask insulated travel mugs graded as of October 2026, level with the 70 out of 100 median for the 9 other insulated travel mugs brands graded alongside it.
Hydro Flask insulated travel mugs average Good on our four-band scale. 8 of the 8 we graded are worth buying. That is above 28% 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 Hydro Flask says and does about PFAS
Hydro Flask does not publish a PFAS policy that we could find. In February 2024, during the controversy over lead in other brands’ tumblers, Cycling Weekly reported that Hydro Flask had said its bottles contain no lead, BPA, phthalates, heavy metals or PFAS. We could not locate that statement on Hydro Flask’s own channels, and we found no independent lab test of its products for PFAS.
- Brand statementCycling Weekly reported in February 2024 that Hydro Flask had released a statement saying its bottles contain no lead, BPA, phthalates, heavy metals or PFAS. Cycling Weekly ↗
- Brand statementHydro Flask’s own post that same week, as quoted by Gizmodo, said it had not used lead in its sealing process for over a decade, and did not mention PFAS. Gizmodo ↗
Sources checked September 14, 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.
Hydro Flask insulated travel mugs worth buying Good or better, best-graded first
Hydro Flask
20-Ounce All Around Tumbler
- stainless steel interior, vacuum-insulated
- Lid/gasket material degradation, The lid often contains silicone or plastic gaskets; extended UV exposure or…
Hydro Flask
32 oz Hydro Flask All Around Travel Tumbler
- Stainless steel body, plastic lid, rubber gasket
- Rubber gasket degradation and contaminant shedding, Repeated thermal cycling and acidic beverages can degrade…
2 hazards checked on this product. See all of them.
Hydro Flask
32 oz Travel Tumbler
- Double-wall stainless steel, proprietary lid gasket
- Silicone gasket degradation and bacterial growth, The proprietary lid gasket is not replaceable by the…
2 hazards checked on this product. See all of them.
Hydro Flask
12 oz Outdoor Tumbler
- Stainless steel wall construction with foam insulation
- Coating degradation and foam exposure, If the seal between stainless steel walls fails due to impact or…
Hydro Flask
24 oz Travel Tumbler
- Stainless steel double-wall insulation, no interior coating disclosed
- Lid seal degradation and bacterial growth, The silicone or rubber gasket in the lid may degrade or trap…
Hydro Flask
All Around Travel Tumbler
- Stainless steel with powder-coated exterior
- Powder-coat degradation, The exterior powder coating can chip or peel if dropped or banged repeatedly…
2 hazards checked on this product. See all of them.
Hydro Flask
All Around Tumbler
- Stainless steel exterior, vacuum insulation, plastic/polymeric lid
- Polymer lid leaching and microplastic, The polymeric lid may shed microplastics if degraded by heat…
2 hazards checked on this product. See all of them.
Hydro Flask
Travel Tumbler
- Stainless steel body with rubber base
- Coating degradation or peeling, If the tumbler interior has an enamel or proprietary coating (not standard in…
2 hazards checked on this product. See all of them.
Better insulated travel mugs from other brands
Graded higher than the Hydro Flask average of 70.
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. Hydro Flask averages 70.
See every Hydro Flask product we grade on the Hydro Flask brand page, or the full insulated travel mugs ranking.