Tumblers - Set of 4 vs 20oz TKWide with Café Cap, Tofu: which is safer?

These two grade almost identically. Pick on price and preference; neither has a PFAS edge.

Ember

Tumblers - Set of 4

PFAS grade

A 100/100

Overall grade

B 88/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel double-wall insulated

Confidence

72%

PossibleDouble-wall separation and structural failure

PossibleLid seals and gasket materials

PossibleNickel sensitivity from stainless steel contact

Why this gradeBuy

Klean Kanteen

20oz TKWide with Café Cap, Tofu

PFAS grade

A 100/100

Overall grade

B 88/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel bottle, stainless steel cap

Confidence

85%

PossibleSilicone gasket degradation

PossibleBacterial colonization in seals

PossibleOff-gassing or odor transfer

Why this gradeBuy

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 travel drinkware: see the full ranking