Autoseal West Loop Stainless Steel Travel Mug vs Rambler Tumbler YETI: which is safer?
Rambler Tumbler YETI is our pick: better on PFAS and on the overall hazard picture.
Contigo
Autoseal West Loop Stainless Steel Travel Mug
PFAS grade
C 75/100
Overall grade
C 71/100
Verdict
Buy
Hazard flags
⚑ 1
Material
stainless steel body, silicone gasket/lid seal
Confidence
78%
PossibleSilicone gasket degradation and bacterial/mold colonization
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
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