Dart Compostable Molded Fiber Hinged Trays ProPlanet Seal vs Compostable Food Storage Container 5ct: which is safer?

Matter Compostable Food Storage Container 5ct is the clear pick. Dart Compostable Molded Fiber Hinged Trays ProPlanet Seal carries a failing PFAS grade, and we never recommend buying a failing product.

Dart Compostable Molded Fiber Hinged Trays ProPlanet Seal

Dart Container

Dart Compostable Molded Fiber Hinged Trays ProPlanet Seal

PFAS grade

Poor 25/100

Overall grade

Bad 3/100

Verdict

Skip

Hazard flags

⚑ 4

Material

molded fiber with unspecified water-resistant coating

Confidence

45%

PossibleCoating leachables (fluorochemicals, unspecified plasticizers)

PossibleMicroplastics or coating particle shedding

ReportedDegradation of coating under exposure conditions

Our pick

Matter Compostable Food Storage Container 5ct

Matter

Compostable Food Storage Container 5ct

PFAS grade

Excellent 100/100

Overall grade

Excellent 92/100

Verdict

Buy

Hazard flags

⚑ 2

Material

Plant-based fiber pulp (compostable)

Confidence

82%

PossibleMicrobe/mold growth if stored damp

PossibleCellulose degradation under repeated hot/wet stress

Where these two actually differ

  • We flag Coating leachables (fluorochemicals, unspecified plasticizers), Microplastics or coating particle shedding, Degradation of coating under exposure conditions and Incomplete compostability if coating is synthetic on the Dart Container 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 Dart Container.
  • The Dart Container is molded fiber with unspecified water-resistant coating 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 Dart Container 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