Vacuum Insulated Tumbler (11 oz) vs Byron 2.0 Stainless Steel Travel Mug Snapseal: which is safer?

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

Calpak

Vacuum Insulated Tumbler (11 oz)

PFAS grade

B 85/100

Overall grade

C 73/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Vacuum-insulated stainless steel and plastic lid

Confidence

72%

PossiblePlastic lid leaching (BPA/BPS, phthalates)

PossibleLid seal degradation and bacterial growth

PossibleVacuum seal loss over time

Why this gradeBuy

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

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