PFAS in Disposable Food Containers, One Certification Beats 65 Containers Without One

We graded 65 disposable food containers. One BPI-certified compostable clamshell from Eco-Products leads at 100. 31 plain plastic, mineral-based and molded fiber containers with no coating on record grade 70. 34 containers with a grease or water-resistant coating, including foam and some "eco" branded clamshells, grade 25.

The middle and bottom tiers cross material types. Both plant-based and plastic containers appear at 70 if uncoated, and both plant-based and foam containers appear at 25 if a coating is on record, so material alone doesn't decide the grade, the coating does.

Summary comparison table

Product	PFAS grade	Material as recorded
Eco-Products Compostable Clear Clamshell	Excellent, 100/100	Plant-based resin, BPI compostability certified
Avant Grub Biodegradable Clamshell	Good, 70/100	Bagasse/plant fiber pulp, no coating on record
Durable Packaging Mineral Clamshell	Good, 70/100	Mineral-based clamshell, uncoated
Avant Grub Chinese Take Out Boxes	Poor, 25/100	Paperboard, grease-resistant coating unspecified
Dart Insulated Foam Hinged Lid Container	Poor, 25/100	Expanded polystyrene foam, coating unspecified

How we graded these

Every grade here is a model-based estimate built from publicly available product information and manufacturer disclosures, not a lab test performed by our team. A high score means lower concern based on reviewed sources, never PFAS-free and never safe. Across the 66 containers the spread is one at 100, 31 at 70 and 34 at 25. Look up any container in our PFAS product finder.

Why the Eco-Products clamshell leads at 100

This is the only container in the guide with BPI compostability certification on record. BPI requires under 100 ppm total fluorine, and our model counts that as third-party verification on top of a material credit for the plant-based resin. It is a fluorine limit, not a PFAS-free lab result, but it is the strongest evidence on file anywhere in this category.

Why 31 containers grade 70

These containers, plastic, mineral-based and molded fiber alike, carry no grease-resistant or water-resistant coating on record. None of their makers has a PFAS statement or certification we could confirm, which keeps 70 as the ceiling for an uncoated container without one.

Why 34 containers grade 25

The largest group carries a grease-resistant or water-resistant coating of unstated composition, including foam containers, a paperboard take-out box marketed as "leakproof, greaseproof," and some containers marketed with "eco" language despite the undisclosed coating. Grease resistance in food packaging is one of the categories where fluorinated coatings have historically been most common, and none of these makers names the chemistry, which is what keeps all 34 at the bottom regardless of the base material.

What to avoid

• "Leakproof" or "greaseproof" marketing on paperboard or fiber containers without a named coating. That describes 34 of the 66 containers here.
• Assuming "eco" or "biodegradable" language means uncoated. Some of the lowest-graded containers here carry that marketing alongside an undisclosed coating.
• Treating BPI certification as a guarantee. It sets a fluorine limit, not a zero-PFAS confirmation.

Our pick

Based on available materials and data, the Eco-Products Compostable Clear Clamshell is the strongest option here on BPI certification. Among the 31 uncoated containers at 70, plain plastic, mineral-based and molded fiber options all represent the same lower-concern tier. Coated containers marketed as leakproof or greaseproof are the ones to check before buying.

FAQ

Do disposable food containers commonly contain PFAS?

Grease-resistant and water-resistant coatings are the category where PFAS use has historically been most documented in food packaging. 34 of the 66 containers we graded carry that kind of coating without naming its chemistry.

Does BPI certification mean a container is PFAS-free?

No. BPI compostability certification requires under 100 ppm total fluorine, which is a limit, not a laboratory confirmation of zero PFAS. It is still the strongest evidence on file for any container in this guide.

Are plant-based or "eco" containers automatically safer?

Not necessarily. Several of the lowest-graded containers here are marketed with eco or biodegradable language while still carrying an undisclosed grease-resistant coating. Check the specific listing in our product finder rather than the marketing term.