Vacuum Insulated Travel Mug with Handle vs Stainless Steel King Travel Mug: which is safer?
THERMOS Stainless Steel King Travel Mug is our pick: better on PFAS and on the overall hazard picture.
S'well
Vacuum Insulated Travel Mug with Handle
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePlastic cap/handle thermal migration
PossibleUndisclosed polymer type and additives in handle/cap
PossibleVacuum seal degradation and mold growth
Our pick
Thermos
Stainless Steel King Travel Mug
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePlastic lid polymer degradation
PossibleGasket/seal material composition
PossibleThermal shock stress on seals
Where these two actually differ
- We flag Plastic cap/handle thermal migration, Undisclosed polymer type and additives in handle/cap, Vacuum seal degradation and mold growth and No third-party safety or PFAS testing disclosed on the S'well and not on the Thermos.
- We flag Plastic lid polymer degradation, Gasket/seal material composition and Thermal shock stress on seals on the Thermos and not on the S'well.
- The S'well is Stainless steel body, plastic handle and cap where the Thermos is Stainless steel interior and exterior, plastic lid, which is most of the difference in these two grades.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More insulated travel mugs: see the full ranking