Beacon Vacuum Insulated Stainless Steel Tumbler vs Stainless Mug: which is safer?
Ello Beacon Vacuum Insulated Stainless Steel Tumbler is our pick: better on PFAS and on the overall hazard picture.
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
Zojirushi
Stainless Mug
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleNickel leaching (from stainless steel alloy)
PossibleBacterial growth in trapped water (between walls)
PossibleThermal stress from extreme temperature swings
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