20oz TKWide with Café Cap, Tofu vs 27oz Stainless Steel Tumbler: which is safer?
Klean Kanteen 20oz TKWide with Café Cap, Tofu is our pick, better on PFAS and on the overall hazard picture.
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
Zojirushi
27oz Stainless Steel Tumbler
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePlastic lid leaching (BPA, BPS, or other endocrine disruptors)
PossibleLid degradation and microplastic release
PossibleSeal material contamination or mold growth
Where these two actually differ
- 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 Zojirushi.
- We flag Plastic lid leaching (BPA, BPS, or other endocrine disruptors), Lid degradation and microplastic release and Seal material contamination or mold growth on the Zojirushi and not on the Klean Kanteen.
- The Klean Kanteen is Stainless steel bottle, stainless steel cap where the Zojirushi is stainless steel with standard plastic lid, which is most of the difference in these two grades.
Both products run through the same public rubric, which covers 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