Rambler 24 oz Mug with Ceramic Lining vs Rambler Stackable Cup with MagSlider Lid: which is safer?
Rambler 24 oz Mug with Ceramic Lining is our pick, better on PFAS and on the overall hazard picture.
Our pick
Yeti
Rambler 24 oz Mug with Ceramic Lining
PFAS grade
Excellent 85/100
Overall grade
Good 73/100
Verdict
Buy
Hazard flags
⚑ 3
Material
stainless steel exterior, ceramic lining interior
Confidence
72%
PossibleCeramic coating degradation over time
PossibleBacterial growth in crevices or damaged coating
PossibleThermal shock or fracture
Yeti
Rambler Stackable Cup with MagSlider Lid
PFAS grade
Good 70/100
Overall grade
Good 59/100
Verdict
Skip
Hazard flags
⚑ 2
Material
Stainless steel body, elastomer lid seal
Confidence
72%
PossibleElastomer lid degradation
PossibleMicroplastic or polymer fragments
Where these two actually differ
- 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 Yeti.
- We flag Elastomer lid degradation and Microplastic or polymer fragments on the Yeti and not on the Yeti.
- The Yeti is stainless steel exterior, ceramic lining interior where the Yeti is Stainless steel body, elastomer lid seal, 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