Recycled Stainless Steel Explorer 24oz Green Jasper vs Stainless Steel King Travel Mug: which is safer?
S'well Recycled Stainless Steel Explorer 24oz Green Jasper is our pick: better on PFAS and on the overall hazard picture.
Our pick
S'well
Recycled Stainless Steel Explorer 24oz Green Jasper
PFAS grade
Excellent 95/100
Overall grade
Excellent 91/100
Verdict
Buy
Hazard flags
⚑ 1
Material
Recycled stainless steel, no coating disclosed
Confidence
82%
PossibleBacterial growth in seams or caps
Thermos
Stainless Steel King Travel Mug
PFAS grade
Excellent 95/100
Overall grade
Excellent 83/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Stainless steel interior and exterior, plastic lid
Confidence
82%
PossiblePlastic lid polymer degradation
PossibleGasket/seal material composition
PossibleThermal shock stress on seals
Where these two actually differ
- We flag Bacterial growth in seams or caps on the S'well and not on the Thermos.
- We flag Plastic lid polymer degradation, Gasket/seal material composition and Thermal shock stress on seals on the Thermos and not on the S'well.
- The S'well is Recycled stainless steel, no coating disclosed where the Thermos is Stainless steel interior and exterior, plastic lid, which is most of the difference in these two grades.
- These two are level, close enough that price and fit should decide it rather than our grade.
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