Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid vs Lock&Lock Insulated Lunch Box, Stainless Steel Lunch Box, Insulated Bowl For Baby Food, Lunch Box For Elementary School: which is safer?
Klean Kanteen Double Wall Vacuum Insulated Stainless Steel Food Canister Container with Leak Proof Lid is our pick: better on PFAS and on the overall hazard picture.
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
Lock & Lock
Lock&Lock Insulated Lunch Box, Stainless Steel Lunch Box, Insulated Bowl For Baby Food, Lunch Box For Elementary School
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBPA, BPS, or phthalates in plastic lids and seals
PossibleMicroplastics from lid degradation
PossibleBacterial or mold growth in seal channels
Where these two actually differ
- We flag Silicone gasket degradation, Bacterial growth in vacuum seal and Surface corrosion under acidic conditions on the Klean Kanteen and not on the Lock & Lock.
- We flag BPA, BPS, or phthalates in plastic lids and seals, Microplastics from lid degradation and Bacterial or mold growth in seal channels on the Lock & Lock and not on the Klean Kanteen.
- The Klean Kanteen is Stainless steel body, silicone gasket lid seal where the Lock & Lock is stainless steel body, standard plastic lids and seals, which is most of the difference in these two grades.
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