Compostable Food Storage Container 5ct vs 9 x 7 x 2.25 Fiber Container 400 per case: which is safer?
Matter Compostable Food Storage Container 5ct is the clear pick. 9 x 7 x 2.25 Fiber Container 400 per case carries a failing PFAS grade, and we never recommend buying a failing product.
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
9 x 7 x 2.25 Fiber Container 400 per case
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyPFAS in barrier coating
PossibleBPA or bisphenol analogues in adhesives or coatings
PossibleChlorine residues from bleaching or coating
Where these two actually differ
- We flag Microbe/mold growth if stored damp and Cellulose degradation under repeated hot/wet stress on the Matter and not on the .
- We flag PFAS in barrier coating, BPA or bisphenol analogues in adhesives or coatings, Chlorine residues from bleaching or coating and Formaldehyde in binders or resins on the and not on the Matter.
- The Matter is Plant-based fiber pulp (compostable) where the is Fiber-based container (likely molded pulp or coated paperboard), 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 45% 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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