Byron 2.0 Stainless Steel Travel Mug Snapseal vs 24oz Double WALL Tumbler: which is safer?

Contigo Byron 2.0 Stainless Steel Travel Mug Snapseal is our pick: better on PFAS and on the overall hazard picture.

Our pick

Contigo

Byron 2.0 Stainless Steel Travel Mug Snapseal

PFAS grade

A 95/100

Overall grade

B 83/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel, silicone gasket

Confidence

78%

PossibleSilicone gasket degradation

PossibleThermal stress cracking

PossibleLid seal failure and contamination

Why this gradeBuy

Thermos

24oz Double WALL Tumbler

PFAS grade

B 85/100

Overall grade

C 77/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Stainless steel interior, plastic/polymer exterior

Confidence

72%

PossiblePolymer exterior durability and degradation

PossiblePFAS in water-repellent or anti-stain coatings (plastic exterior)

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 drinkware tumblers: see the full ranking