Quencher Luxe FlowState Tumbler vs Rambler Tumbler YETI: which is safer?

Rambler Tumbler YETI is the clear pick. Stanley Quencher Luxe FlowState Tumbler carries a failing PFAS grade, and we never recommend buying a failing product.

Stanley

Quencher Luxe FlowState Tumbler

PFAS grade

D 65/100

Overall grade

F 57/100

Verdict

Skip

Hazard flags

⚑ 2

Material

Stainless steel tumbler with plastic lid

Confidence

72%

PossiblePlastic lid degradation and microplastic release with heat exposure

PossibleSilicone gasket durability and microbial growth if not maintained

Why this grade

Our pick

Yeti

Rambler Tumbler YETI

PFAS grade

B 80/100

Overall grade

C 76/100

Verdict

Buy

Hazard flags

⚑ 1

Material

18/8 stainless steel, no coating

Confidence

82%

PossibleNickel leaching from stainless steel

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 drink tumblers & travel mugs: see the full ranking