Blueberry Modular Clamshell vs Compostable Fiber Compost-A-Pak Containers: which is safer?
World Centric Compostable Fiber Compost-A-Pak Containers is the clear pick. Pactiv Evergreen Blueberry Modular Clamshell carries a failing PFAS grade, and we never recommend buying a failing product.
Pactiv Evergreen
Blueberry Modular Clamshell
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
LikelyPFAS in grease-resistant coating
PossibleMicroplastics from coating degradation
PossibleThermal migration at elevated temperatures
Our pick
World Centric
Compostable Fiber Compost-A-Pak Containers
PFAS grade
Overall grade
Verdict
Hazard flags
Material
Confidence
PossibleProprietary coating chemical migration
PossibleMoisture and microbial growth in fiber matrix
ReportedCoating degradation under heat or fatty foods
Where these two actually differ
- We flag PFAS in grease-resistant coating, Microplastics from coating degradation and Thermal migration at elevated temperatures on the Pactiv Evergreen and not on the World Centric.
- We flag Proprietary coating chemical migration, Moisture and microbial growth in fiber matrix, Coating degradation under heat or fatty foods and Recycling contamination if misdisposed on the World Centric and not on the Pactiv Evergreen.
- The Pactiv Evergreen is Polypropylene clamshell with grease-resistant coating where the World Centric is Fiber-based (wood pulp/molded fiber), compostable coating, 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 World Centric is the one to buy.
- We are less certain about the Pactiv Evergreen grade, at 35% confidence against 78%, because it discloses less.
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 food packaging: see the full ranking