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

Built NY

Puffer Lunch Box - Abstract Mulberry

PFAS grade

Poor 25/100

Overall grade

Bad 13/100

Verdict

Skip

Hazard flags

⚑ 3

Material

Polyester outer with unspecified water-resistant coating

Confidence

45%

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

Klean Kanteen

Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid

PFAS grade

Excellent 100/100

Overall grade

Excellent 88/100

Verdict

Buy

Hazard flags

⚑ 3

Material

Stainless steel body, silicone gasket lid seal

Confidence

82%

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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