Do Hydro Flask insulated drink tumblers have PFAS?
Hydro Flask insulated drink tumblers average 70 out of 100 on PFAS Authority's PFAS and toxin screen across the 4 Hydro Flask insulated drink tumblers graded as of October 2026, below the 73 out of 100 median for the 26 other insulated drink tumblers brands graded alongside it.
Hydro Flask insulated drink tumblers average Good on our four-band scale. 4 of the 4 we graded are worth buying. That is above 23% of the insulated drink tumblers 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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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 drink tumblers worth buying Good or better, best-graded first
- Stainless steel with vacuum insulation
- Microplastic shedding from cap or seals. If the lid is plastic or contains plastic components, wear or…
2 hazards checked on this product, all on its full breakdown.
- Stainless steel with vacuum insulation
- Silicone gasket degradation. Silicone gaskets are generally food-safe but can degrade if exposed to prolonged…
- Stainless steel tumbler, plastic/silicone lid
- BPA & bisphenols. Hydro Flask does not publicly disclose lid resin type or additives. Standard food-grade…
3 hazards checked on this product, all on its full breakdown.
- stainless steel with unspecified interior coating/lining
- Interior coating composition and migration. The interior coating material is not disclosed; if it contains…
3 hazards checked on this product, all on its full breakdown.
Better insulated drink tumblers from other brands
Graded higher than the Hydro Flask average of 70.
- Stainless steel bottle, stainless steel cap
- The brand calls it PFAS-free, which we have not verified
- Powder-coat cap degradation over time
3 hazards checked on this product, all on its full breakdown.
- Stainless steel body, powder-coat finish
- The brand calls it PFAS-free, which we have not verified
- Powder-coat finish degradation
3 hazards checked on this product, all on its full breakdown.
- Stainless steel bottle, plastic cap and silicone gasket
- The brand calls it PFAS-free, which we have not verified
- Silicone gasket degradation and leaching
3 hazards checked on this product, all on its full breakdown.
The same question, asked of the other insulated drink tumblers 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 drink tumblers ranking.