IceFlow 2.0 Flip Straw Tumbler vs Rambler Tumbler YETI: which is safer?

Rambler Tumbler YETI is the clear pick. Stanley IceFlow 2.0 Flip Straw Tumbler carries a failing PFAS grade, and we never recommend buying a failing product.

Stanley

IceFlow 2.0 Flip Straw Tumbler

PFAS grade

D 65/100

Overall grade

F 41/100

Verdict

Skip

Hazard flags

⚑ 3

Material

Stainless steel tumbler, plastic flip straw lid

Confidence

75%

PossiblePlastic lid and straw leaching (BPA/phthalates)

ReportedDegradation of plastic seals/gaskets over time

ReportedBacterial growth in straw and lid crevices

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