Carryout Lunch Bag 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. Hydro Flask Carryout Lunch Bag carries a failing PFAS grade, and we never recommend buying a failing product.
Hydro Flask
Carryout Lunch Bag
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossiblePhthalates (polyester component)
ReportedMicroplastics from coating degradation
PossibleUnspecified finish leachables
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 Phthalates (polyester component), Microplastics from coating degradation, Unspecified finish leachables and Mold and bacterial growth if not dried on the Hydro Flask 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 Hydro Flask.
- The Hydro Flask is Nylon/polyester outer with unspecified water-resistant finish 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 Hydro Flask grade, at 35% 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 →
More lunch boxes: see the full ranking