16 Oz. Otterbox Elevation Core Colors Stainless Steel Tumbler 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.
OtterBox
16 Oz. Otterbox Elevation Core Colors Stainless Steel Tumbler
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleStainless steel corrosion and pitting
ReportedLid and gasket material degradation
PossibleDouble-wall insulation material unknown
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 Stainless steel corrosion and pitting, Lid and gasket material degradation and Double-wall insulation material unknown on the OtterBox 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 OtterBox.
- The OtterBox is stainless steel with no disclosed coating 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