Essential Tumbler 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.
RTIC
Essential Tumbler
PFAS grade
Good 70/100
Overall grade
Good 59/100
Verdict
Skip
Hazard flags
⚑ 2
Material
Stainless steel with double-wall vacuum insulation
Confidence
78%
PossibleLid gasket/seal degradation
PossibleBacterial growth in insulation gap
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
Where these two actually differ
- We flag Lid gasket/seal degradation and Bacterial growth in insulation gap on the RTIC 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 RTIC.
- The RTIC is Stainless steel with double-wall vacuum insulation 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: 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