Byron 2.0 Stainless Steel Travel Mug Snapseal vs Stainless Carry 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

Zojirushi

Stainless Carry Tumbler

PFAS grade

A 95/100

Overall grade

C 77/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel interior, plastic exterior

Confidence

78%

PossibleStainless steel interior corrosion or nickel release

PossibleSeal integrity and bacterial growth in lid

ReportedThermal shock or seal failure from extreme temperature swings

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