24oz Tumbler with Straw 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
24oz Tumbler with Straw
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBPA/BPS and plasticizers in lid and straw
PossibleMicroplastics from plastic degradation
ReportedRubber gasket degradation and mold growth
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 BPA/BPS and plasticizers in lid and straw, Microplastics from plastic degradation, Rubber gasket degradation and mold growth and Lid printing or coating adhesion 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 double-wall with plastic lid and straw 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