Autoseal West Loop Stainless Steel Travel Mug vs Rambler 24 oz Mug with Ceramic Lining: which is safer?
Rambler 24 oz Mug with Ceramic Lining edges it on pure PFAS risk, but Contigo Autoseal West Loop Stainless Steel Travel Mug wins overall once other hazards are counted.
Our pick
Contigo
Autoseal West Loop Stainless Steel Travel Mug
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSilicone gasket degradation and bacterial/mold colonization
Yeti
Rambler 24 oz Mug with Ceramic Lining
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleCeramic coating degradation over time
PossibleBacterial growth in crevices or damaged coating
PossibleThermal shock or fracture
Where these two actually differ
- We flag Silicone gasket degradation and bacterial/mold colonization on the Contigo and not on the Yeti.
- We flag Ceramic coating degradation over time, Bacterial growth in crevices or damaged coating and Thermal shock or fracture on the Yeti and not on the Contigo.
- The Contigo is stainless steel body, silicone gasket/lid seal where the Yeti is stainless steel exterior, ceramic lining interior, which is most of the difference in these two grades.
- These two are 5 points apart, close enough that price and fit should decide it rather than our grade.
Both products run through the same public rubric, which covers 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 mugs, see the full ranking