S'ip by S'well Travel Mug 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.
S'well
S'ip by S'well Travel Mug
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePlastic lid polymer leaching (BPA/BPS, phthalates)
PossibleBacterial growth in lid crevices and seals
PossibleMicroplastic shedding from lid wear
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 Plastic lid polymer leaching (BPA/BPS, phthalates), Bacterial growth in lid crevices and seals and Microplastic shedding from lid wear on the S'well 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 S'well.
- The S'well is Stainless steel with plastic lid components 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