Genpak · Disposable Food Containers
Genpak Hinged Foam Container
Skip. Foam food containers often contain PFAS for grease resistance.
Genpak hinged foam containers lack public PFAS disclosure. Expanded foam used for food packaging frequently contains PFAS-based water and grease repellent coatings to prevent leakage.
The safe swap
Lakeland
Sustainables 3 Compartment Hinged Lid To Go Food Container
70/100 safety
Same rubric that flunked this product. The swap earned its C.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Expanded polystyrene foam with possible grease-resistant treatment
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
food packaging is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
Genpak hinged foam containers are expanded polystyrene (EPS foam), a closed-cell plastic chosen for insulation and cushioning in food service. The material is inherently porous and absorbs oils and fats from foods. To prevent grease from degrading the foam structure, manufacturers typically apply fluorinated coatings or saturants (PFAS-based treatments). EPS itself is chemically stable when uncoated, but the treatment layer is where contamination risk concentrates.
The brand's record and disclosure
Genpak, a major U.S. foam foodware supplier, has not published public statements on PFAS content, phase-out timelines, or grease-resistant treatment chemistry. The company does not list PFAS certification or transparency reports in accessible sustainability documentation. This silence is notable given that competitors in the foodware sector have begun disclosing or eliminating PFAS-containing treatments in response to regulatory pressure and health concerns.
How it compares in its category
Foam hinged containers dominate quick-service food packaging because they are cheap and effective insulators. However, they consistently rank among the highest-risk single-use food containers for PFAS presence. Alternatives such as uncoated cardboard clamshells, molded fiber, or plant-based bioplastics avoid PFAS-treated foam but trade thermal performance. Rigid plastic or aluminum containers also avoid PFAS but typically require higher material costs.
If you buy it
Do not use these containers for hot, fatty, or acidic foods, as heat and oils accelerate migration of treatment chemicals into food. Store only at room temperature and for short durations. Do not microwave, reheat, or freeze in the container. Replace immediately if foam shows cracks, discoloration, or degradation. Consider that single-use containers should not be reused regardless of condition.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
PFAS in grease-resistant coatings
Expanded polystyrene food containers widely use PFAS-based treatments for grease barrier function. Genpak's silence on treatment chemistry and lack of public PFAS phase-out commitment suggests routine use of these coatings. Migration into fatty or hot foods is well-documented in scientific literature.
Styrene monomer leaching
EPS foam can release residual styrene (a probable human carcinogen per NTP) when exposed to heat, prolonged storage, or contact with alcohol and oils. Risk increases if foam is degraded or aged. Likelihood is lower than PFAS but cannot be excluded for older or damaged containers.
Microplastic fragmentation
Foam containers break apart during handling, storage, and use, releasing foam particles into food and the environment. While not chemically toxic in small amounts, ingested microplastics and their potential for contaminant absorption remain areas of active research concern.
BPA or other estrogenic plasticizers
EPS foam does not typically contain BPA or phthalates in its base resin. However, some older or non-virgin EPS may contain trace contaminants. No specific record of BPA presence in Genpak containers, but not independently verified for all formulations.
Coating degradation and unknown additives
Genpak does not publicly detail the full chemical composition of grease-resistant treatments applied to these containers. Over time, coatings degrade, potentially releasing unspecified additives or treatment residues into food. Lack of ingredient disclosure prevents precise hazard identification.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Disposable Food Containers
Lakeland
Sustainables 3 Compartment Hinged Lid To Go Food Container
Molded fiber/pulp (plant-based)
Lower concern. Molded fiber food containers unlikely to contain PFAS.
⚠Risky category by default
Lakeland
Hefty Food Service Containers Rectangle 9 3/4" x 5" x 3 1/4" 125 ct
Polypropylene (disposable food containers)
Lower concern, but brand discloses nothing about PFAS.
⚠Risky category by default
Rubbermaid
TakeAlongs Food Storage Containers 10 Piece Set
polypropylene plastic containers with lids
Lower concern; basic plastic food storage with no known PFAS triggers.
⚠Risky category by default
More disposable food containers grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.