Hefty · Disposable Food Service Containers
Stock Your Home 6-inch Clamshell Take Out Food Containers
Likely lower PFAS concern, but grease-resistant coating unverified.
Hefty clamshells are polypropylene with a grease-resistant treatment typical of food packaging. No PFAS claim or third-party testing disclosed; standard food-contact safety rules apply.
The safe swap
Compostables
Eco-Products Compostable Clear Clamshell Hinged Food
100/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Polypropylene (PP) clamshell 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
Hefty's 6-inch clamshells are polypropylene (PP, #5 plastic), a thermoplastic polymer that is one of the most chemically inert food-contact plastics. PP does not leach BPA, BPS, or phthalates under normal use because its molecular structure does not include those compounds. The "grease-resistant coating" applied to the container interior is not publicly specified by Hefty; if it contains Teflon-type coating (Teflon) or siloxane-based treatments, those are stable at room temperature and during cold storage but are not confirmed in available product literature.
The brand's record and disclosure
Hefty (owned by Pactiv Evergreen) does not publish detailed chemical disclosures for its disposable food containers on packaging or website. The brand has no public history of recalls or litigation over leaching or chemical contamination in clamshells. Industry-wide, Hefty is a mainstream commodity manufacturer; the company does not claim PFAS-free status nor provide third-party testing results for this product line, leaving grease-resistance chemistry unverified.
How it compares in its category
PP clamshells are the standard baseline for disposable takeout containers and are considered chemically safer than polystyrene (PS, #6) for food contact. Most competitors (Dart, Solo, store brands) use identical PP formulations with similar unspecified coatings. Glass or stainless steel alternatives eliminate coating hazards entirely but are heavier and not disposable. This product occupies the middle ground: widely accepted chemistry with unresolved coating transparency.
If you buy it
Use these containers for cold, room-temperature, and lightly warm foods only; do not microwave or place in direct heat, as PP's melting point is around 130, 150°C and overheating can degrade the polymer and coating. Store dried foods or food without prolonged contact with oils or acidic liquids to minimize any coating migration risk. Replace containers if visible discoloration, warping, or scratching appears. Wash by hand in cool water rather than dishwasher heat if possible to extend coating integrity.
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.”
BPA and phthalates
Polypropylene does not contain BPA or phthalates in its base formulation; none reported in Hefty clamshells. Risk is absent unless coating additives are not disclosed.
Microplastics shedding
Repeated use, scratching, or thermal stress can degrade PP and any surface coating, potentially releasing microscopic polymer fragments into food. This is a general PP concern, not specific to Hefty, but design durability and coating adhesion are unknown.
Grease-resistant coating stability
The grease-resistant treatment is unspecified by manufacturer. If Teflon-type coating or PFOA-related compounds are used, they are stable at room temperature but migration risk with high-fat foods or heat is not documented. Lack of transparency prevents full hazard assessment.
Heat-induced polymer breakdown
Polypropylene begins to soften and degrade above 130°C. Microwaving or hot-filling these containers can accelerate coating breakdown and potential leaching of additives into food. This is inherent to PP, not a Hefty-specific flaw.
Mold and bacterial growth if reused
These are single-use disposables; reuse for storage can trap bacteria in crevices or a degraded coating, though this is a user-practice issue rather than a manufacturing hazard.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 62% 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 Service Containers
Compostables
Eco-Products Compostable Clear Clamshell Hinged Food
Compostable resin (PLA/PBAT blend, plant-based)
Lower concern. Compostable clamshell with PFAS-free claim and certifications.
✓Verified PFAS-free by a third party
Hefty
Food Storage Containers with Lids
Polypropylene (PP) plastic container with lids
Lower concern. Polypropylene containers unlikely to contain intentional PFAS.
⚠Risky category by default
Hefty
Clear Plastic Hinged Take-Out Containers
polypropylene (PP) plastic
Lower concern; no known PFAS risk from PP hinged containers.
⚠Risky category by default
More disposable food service 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.