Tumbler Cup 30oz 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
Tumbler Cup 30oz
PFAS grade
Good 70/100
Overall grade
Good 62/100
Verdict
Buy
Hazard flags
⚑ 2
Material
borosilicate glass
Confidence
85%
PossiblePhysical breakage and sharp edges
PossibleThermal shock cracking
Our pick
Klean Kanteen
20oz TKWide with Café Cap, Tofu
PFAS grade
Excellent 95/100
Overall grade
Excellent 83/100
Verdict
Buy
Hazard flags
⚑ 3
Material
Stainless steel bottle, stainless steel cap
Confidence
85%
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 Physical breakage and sharp edges and Thermal shock cracking 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 borosilicate glass where the Klean Kanteen is Stainless steel bottle, stainless steel cap, 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