Genpak · Disposable Food Containers
Genpak Foam Hinged
Foam food packaging; grease-resistant treatment risk unclear, no brand disclosure.
Genpak Foam Hinged is expanded polystyrene with a grease-resistant surface treatment commonly used in food packaging. Genpak does not disclose PFAS status; treatment composition unknown without manufacturer specification.
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 grease-resistant coating
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 Foam Hinged containers are expanded polystyrene (EPS or styrofoam) with a grease-resistant coating applied to the interior. Polystyrene itself is a stable plastic at room temperature, but the grease-resistant treatment is the concern: these coatings historically used PFAS-based fluorochemicals, though Genpak has not publicly disclosed the chemistry of their specific formulation. The foam structure is also prone to fragmentation when stressed, shedding microparticles into food.
The brand's record and disclosure
Genpak is a major North American food-packaging manufacturer but maintains opacity on PFAS use and phase-out timelines. No public PFAS elimination commitment or third-party certification (such as NFCC Safer Choice) is on record. The company has faced no major recalls or public safety controversies specific to this product line, but their silence on fluorochemical chemistry in grease coatings is a red flag in an industry where competitors have begun disclosing alternatives.
How it compares in its category
Polystyrene hinged containers are the cost-leader in takeout packaging and remain widely used despite environmental and chemical concerns. Competitors offering certified PFAS-free foam (e.g., some Huhtamaki and Dart lines) or compostable alternatives (sugarcane-based, PLA) are available at modest cost premiums. Paperboard clamshells and molded fiber are safer chemically but less grease-resistant and more expensive.
If you buy it
Use only for cold or room-temperature foods (salads, sandwiches, baked goods). Do not microwave or contact hot liquids above 160F, as heat accelerates leaching of styrene and potential coating breakdown. Replace after 1-2 uses; reuse is not recommended because grease exposure and stress fracture the foam. Store in a cool, dry place to prevent off-gassing.
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 coating
Foam food-service packaging typically uses fluorinated water-and-grease-resistant treatments; Genpak has not disclosed the chemistry or PFAS status of their formulation, making it impossible to rule out legacy PFAS.
Styrene leaching at elevated temperature
Polystyrene can leach styrene monomer into food when heated above 160F or when in prolonged contact with fatty or acidic foods. This is a known property of the material class, though risk is low at room temperature.
Microplastic shedding
Expanded polystyrene foam fragments readily under mechanical stress (stacking, opening hinges, food abrasion). Fragments can enter food and be ingested; long-term ingestion effects remain under study.
Coating degradation and leachate
The grease-resistant coating may degrade or flake with repeated use or thermal stress, releasing unknown chemical residues into fatty foods. Quality and durability of Genpak's specific coating are not independently verified.
BPA and phthalate contamination
Polystyrene foam does not typically contain BPA or phthalates as primary constituents, though contaminants from manufacturing or recycled resin are not ruled out; no specific recalls for this product.
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.