Go Cup XL 30oz Mauve vs 16oz Rise Tumbler: which is safer?
Klean Kanteen 16oz Rise Tumbler is our pick: better on PFAS and on the overall hazard picture.
Corkcicle
Go Cup XL 30oz Mauve
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePlastic lid and gasket material identity
PossibleOff-gassing from plastic components at elevated temperature
PossibleGasket degradation and bacterial growth
Our pick
Klean Kanteen
16oz Rise Tumbler
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePowder-coat finish degradation
PossibleSeal degradation and microbial growth
PossibleThermal shock to seals
Where these two actually differ
- We flag Plastic lid and gasket material identity, Off-gassing from plastic components at elevated temperature and Gasket degradation and bacterial growth on the Corkcicle and not on the Klean Kanteen.
- We flag Powder-coat finish degradation, Seal degradation and microbial growth and Thermal shock to seals on the Klean Kanteen and not on the Corkcicle.
- The Corkcicle is Stainless steel with plastic lid and gaskets where the Klean Kanteen is Stainless steel body, powder-coat finish, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.
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 drink tumblers: see the full ranking