28 oz. Stainless Steel Tumbler, Black vs 20oz TKWide with Café Cap, Tofu: which is safer?
Klean Kanteen 20oz TKWide with Café Cap, Tofu is our pick: better on PFAS and on the overall hazard picture.
Anchor
28 oz. Stainless Steel Tumbler, Black
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleNickel leaching from stainless steel alloy
PossibleMicroabrasion or metal particles in beverage
Our pick
Klean Kanteen
20oz TKWide with Café Cap, Tofu
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePowder-coat cap degradation over time
PossibleBacterial biofilm in cap threads and seals
PossibleThermal stress on seals at extreme temperatures
Where these two actually differ
- We flag Nickel leaching from stainless steel alloy and Microabrasion or metal particles in beverage on the Anchor and not on the Klean Kanteen.
- We flag Powder-coat cap degradation over time, Bacterial biofilm in cap threads and seals and Thermal stress on seals at extreme temperatures on the Klean Kanteen and not on the Anchor.
- The Anchor is Stainless steel tumbler, bare metal where the Klean Kanteen is Stainless steel bottle, stainless steel cap, 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 drink tumblers: see the full ranking