Compostable Food Storage Container 5ct vs 8" x 8" x 3" Compostable Fiber Clamshells: which is safer?
Matter Compostable Food Storage Container 5ct is the clear pick. World Centric 8" x 8" x 3" Compostable Fiber Clamshells 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
World Centric
8" x 8" x 3" Compostable Fiber Clamshells
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyUnknown grease-barrier coating chemistry
PossibleCoating degradation under heat or prolonged contact
PossibleBacterial growth or mold if stored damp
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 World Centric.
- We flag Unknown grease-barrier coating chemistry, Coating degradation under heat or prolonged contact and Bacterial growth or mold if stored damp on the World Centric and not on the Matter.
- The Matter is Plant-based fiber pulp (compostable) where the World Centric is fiber pulp (compostable); grease-resistant coating unknown, 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 World Centric 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 →
More food packaging, see the full ranking