TUMBLER 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
TUMBLER
PFAS grade
Good 70/100
Overall grade
Good 62/100
Verdict
Buy
Hazard flags
⚑ 2
Material
Double-wall stainless steel with plastic lid/plug
Confidence
72%
PossiblePlastic lid/plug composition and leaching
PossibleBacterial growth in double-wall seal or drainage holes
Our pick
Klean Kanteen
16oz Rise Tumbler
PFAS grade
Excellent 95/100
Overall grade
Excellent 83/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Stainless steel body, powder-coat finish
Confidence
82%
PossiblePowder-coat finish degradation
PossibleSeal degradation and microbial growth
PossibleThermal shock to seals
Where these two actually differ
- We flag Plastic lid/plug composition and leaching and Bacterial growth in double-wall seal or drainage holes 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 Double-wall stainless steel with plastic lid/plug 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