West Loop 3.0 Stainless Steel Travel Mug with AUTOSEAL Lid vs Rambler 24 oz Mug with Ceramic Lining: which is safer?
Rambler 24 oz Mug with Ceramic Lining is our pick, better on PFAS and on the overall hazard picture.
Contigo
West Loop 3.0 Stainless Steel Travel Mug with AUTOSEAL Lid
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleLid polymer composition and potential PFAS in water-repellent treatments
PossibleSilicone gasket degradation and leaching
PossibleAcetal or polypropylene lid aging and heat degradation
Our pick
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 Lid polymer composition and potential PFAS in water-repellent treatments, Silicone gasket degradation and leaching, Acetal or polypropylene lid aging and heat degradation and Bacterial or mold growth in sealed mechanism 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, polymer lid where the Yeti is stainless steel exterior, ceramic lining interior, which is most of the difference in these two grades.
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