Cold Tumbler vs Trek Pivot 30oz Flip Straw Tumbler: which is safer?

Ember Cold Tumbler is our pick: better on PFAS and on the overall hazard picture.

Our pick

Ember

Cold Tumbler

PFAS grade

A 100/100

Overall grade

A 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

stainless steel with silicone seal

Confidence

72%

PossibleSilicone seal degradation and microbial growth

PossibleCoatings or adhesives on printed logos

Why this gradeBuy

Simple Modern

Trek Pivot 30oz Flip Straw Tumbler

PFAS grade

B 85/100

Overall grade

D 69/100

Verdict

Buy

Hazard flags

⚑ 4

Material

Double-wall stainless steel with plastic lid/straw

Confidence

72%

PossibleBPA/phthalate leaching from plastic lid and straw

PossiblePlastic degradation and microplastic shedding over time

PossibleLid seal degradation 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 travel drinkware: see the full ranking