Icon 16 oz Stainless Steel Tumbler vs Stainless Steel King Travel Mug: which is safer?

Thermos Icon 16 oz Stainless Steel Tumbler is our pick: better on PFAS and on the overall hazard picture.

Our pick

Thermos

Icon 16 oz Stainless Steel Tumbler

PFAS grade

A 95/100

Overall grade

B 87/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Stainless steel interior, BPA-free plastic exterior

Confidence

82%

PossiblePlastic exterior degradation and microplastic shedding

PossibleSilicone gasket bacterial or mold growth

Why this gradeBuy

Thermos

Stainless Steel King Travel Mug

PFAS grade

A 95/100

Overall grade

B 83/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel interior and exterior, plastic lid

Confidence

82%

PossiblePlastic lid polymer degradation

PossibleGasket/seal material composition

PossibleThermal shock stress on seals

Why this gradeBuy

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