27oz Stainless Steel Tumbler vs Stainless Vacuum Insulated Tumbler: which is safer?

Zojirushi 27oz Stainless Steel Tumbler is our pick: better on PFAS and on the overall hazard picture.

Our pick

Zojirushi

27oz Stainless Steel Tumbler

PFAS grade

A 95/100

Overall grade

B 83/100

Verdict

Buy

Hazard flags

⚑ 3

Material

stainless steel with standard plastic lid

Confidence

82%

PossiblePlastic lid leaching (BPA, BPS, or other endocrine disruptors)

PossibleLid degradation and microplastic release

PossibleSeal material contamination or mold growth

Why this gradeBuy

Zojirushi

Stainless Vacuum Insulated Tumbler

PFAS grade

A 95/100

Overall grade

C 77/100

Verdict

Buy

Hazard flags

⚑ 3

Material

stainless steel exterior, vacuum insulation, plastic interior liner

Confidence

78%

PossiblePlastic interior liner composition and leaching

ReportedBacterial or mold growth in sealed compartments

PossibleLid gasket degradation and replacement availability

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 drink tumblers: see the full ranking