Kraft Compostable Stand Up Valve vs Compostable Food Storage Container 5ct: which is safer?
Matter Compostable Food Storage Container 5ct is the clear pick. Kraft Compostable Stand Up Valve carries a failing PFAS grade, and we never recommend buying a failing product.
Kraft Compostable Stand Up Valve
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleUnspecified barrier coating leaching (non-PFAS)
PossibleMoisture barrier degradation
PossibleMicroplastic shedding from valve components
Our pick
Matter
Compostable Food Storage Container 5ct
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleMicrobe/mold growth if stored damp
PossibleCellulose degradation under repeated hot/wet stress
Where these two actually differ
- We flag Unspecified barrier coating leaching (non-PFAS), Moisture barrier degradation and Microplastic shedding from valve components on the and not on the Matter.
- We flag Microbe/mold growth if stored damp and Cellulose degradation under repeated hot/wet stress on the Matter and not on the .
- The is Kraft paper with valve; grease-resistant coating unspecified where the Matter is Plant-based fiber pulp (compostable), 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 Matter is the one to buy.
- We are less certain about the grade, at 35% confidence against 82%, because it discloses less.
Both products run through the same public rubric, which covers 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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