40oz Stainless Steel Tumbler vs Beacon Vacuum Insulated Stainless Steel Tumbler: which is safer?
Ello Beacon Vacuum Insulated Stainless Steel Tumbler is our pick: better on PFAS and on the overall hazard picture.
Calpak
40oz Stainless Steel Tumbler
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleNickel leaching (stainless steel alloy)
PossibleLid gasket and seal degradation
PossibleBacterial or mold growth in insulation gap
Our pick
Ello
Beacon Vacuum Insulated Stainless Steel Tumbler
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBacterial growth in lid gaskets and seals
PossibleVacuum seal degradation and loss of insulation
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 drinkware tumblers: see the full ranking