Lunch Food Box vs Bento Lunch Box 1,65 L: which is safer?
Klean Kanteen Lunch Food Box is our pick: better on PFAS and on the overall hazard picture.
Our pick
Klean Kanteen
Lunch Food Box
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleBamboo fiber lid degradation or contaminant absorption
PossibleGasket or seal material composition
PossibleBamboo fiber formaldehyde or chemical treatment residue
Sistema
Bento Lunch Box 1,65 L
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleMicroplastics from degradation
PossibleBacterial colonization of seams and gaskets
Where these two actually differ
- We flag Bamboo fiber lid degradation or contaminant absorption, Gasket or seal material composition and Bamboo fiber formaldehyde or chemical treatment residue on the Klean Kanteen and not on the Sistema.
- We flag Microplastics from degradation and Bacterial colonization of seams and gaskets on the Sistema and not on the Klean Kanteen.
- The Klean Kanteen is stainless steel with bamboo fiber lid where the Sistema is Polypropylene (PP) plastic container and lid, which is most of the difference in these two grades.
- The gap is 30 points, wide enough that this is not a close call, and the Klean Kanteen is the one to buy.
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 & food containers: see the full ranking