Puffer Lunch Box - Abstract Mulberry vs Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid: which is safer?
Klean Kanteen Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid is the clear pick. Built NY - Puffer Lunch Box - Abstract Mulberry carries a failing PFAS grade, and we never recommend buying a failing product.
Built NY
Puffer Lunch Box - Abstract Mulberry
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUnspecified water-resistant coating (likely fluorochemical)
PossiblePolyester fiber shedding and microplastic migration
PossibleLeaching from coating into acidic or fatty food
Our pick
Klean Kanteen
Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleSilicone gasket degradation
PossibleBacterial growth in vacuum seal
PossibleSurface corrosion under acidic conditions
Where these two actually differ
- We flag Unspecified water-resistant coating (likely fluorochemical), Polyester fiber shedding and microplastic migration and Leaching from coating into acidic or fatty food on the Built NY and not on the Klean Kanteen.
- We flag Silicone gasket degradation, Bacterial growth in vacuum seal and Surface corrosion under acidic conditions on the Klean Kanteen and not on the Built NY.
- The Built NY is Polyester outer with unspecified water-resistant coating where the Klean Kanteen is Stainless steel body, silicone gasket lid seal, which is most of the difference in these two grades.
- The gap is 75 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.
- We are less certain about the Built NY grade, at 45% confidence against 82%, because it discloses less.
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 →
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