Stock Your Home · Disposable Food Containers
Stock Your Home Plastic 5 x 5 Inch Clamshell Takeout
Skip. PFAS risk probable due to grease-resistant coating.
Stock Your Home polystyrene clamshells likely have grease-resistant coatings. No brand disclosure available for PFAS content or verification testing.
The better-graded swap
Eco-Products
Eco-Products Compostable Clear Clamshell Hinged Food
100/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Polystyrene clamshell, likely grease-resistant coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Waterproof / stain-resistant treatment
Water-repellent coating treatments have historically used PFAS.
PFAS
Polystyrene clamshells marketed for grease resistance typically employ fluorinated coatings (PFOA, PFOS, GenX, or other PFAS). No disclosure from Durable Packaging on this product confirms absence; absence of claim suggests presence.
Source, ATSDR ↗Styrene monomer leaching
Polystyrene can release trace styrene, especially under heat or with fatty foods; migration is generally low at room temperature but increases with hot greasy items. Long-term exposure to styrene is classified as reasonably anticipated to be a human carcinogen by NTP.
Additive leaching (plasticizers, colorants)
Polystyrene may contain flame retardants, processing aids, or pigments not fully disclosed on product packaging. These can migrate at low levels, especially into fatty foods. The grease-resistant coating itself may shed microparticles if degraded.
Microplastic or coating particle shedding
Repeated handling, temperature cycling, or contact with abrasive foods can degrade the applied coating, releasing micro-fragments into food. No published testing for this product confirms degree of risk.
What’s reassuring
BPA & bisphenols
No public record of BPA or BPS contamination in Durable Packaging polystyrene clamshells specifically. Polystyrene is not inherently a BPA product line, but confirmation would require manufacturer testing data not publicly available.
Source, FDA ↗The full breakdown
What it's made of and why it matters
This is a polystyrene (PS #6) clamshell, a rigid thermoplastic commonly used for takeout because it is lightweight and clear. Polystyrene itself is considered relatively stable under room temperature, but the grease-resistant coating applied to these containers to repel oils and sauces is the primary chemical concern. Grease-resistant food-contact coatings on polystyrene have historically relied on fluorinated compounds (PFAS) to achieve water and oil repellency; this product's coating composition is not disclosed by the manufacturer.
The brand's record and disclosure
Durable Packaging, a major supplier of disposable foodservice containers, maintains minimal public transparency about coating chemistry or PFAS use in their product lines. No third-party certifications (such as certification to GFSI standards or explicit PFAS-free claims) are publicly documented for this SKU. The brand has not published a commitment to phase out PFAS in food-contact articles, distinguishing it from competitors who have made such pledges in response to regulatory pressure.
How it compares in its category
Polystyrene clamshells are among the most commonly distributed takeout containers in North America and typically cost less than uncoated alternatives (cardboard, molded fiber, or PLA). Many competitors now offer or are transitioning to uncoated or versions without a grease-resistant coating; however, cost-optimized disposables like this one often retain legacy coatings to maximize shelf life and performance. Polystyrene itself is less of a concern than the applied coating; the hazard is the treatment, not the base resin.
If you buy it
Avoid using for hot or fatty foods, as heat and lipid content can increase migration of coating constituents into food. Store only at room temperature; do not freeze or microwave. Do not wash and reuse; these containers are designed for single use. If you must use them, limit contact time and choose for dry items (bakery, non-greasy solids) rather than hot prepared foods or sauces.
What we don’t know
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Stock Your Home has made none
Formulations change between production runs, so check the current label. How we grade.
Better-graded alternatives in Disposable Food Containers
Eco-Products
Compostable Clear Clamshell Hinged Food
Compostable resin (PLA/PBAT blend, plant-based)
Thermal degradation and chemical release at use temperatures
Limited concern
BPI Certified Compostable certification on record.
✓Verified PFAS-free by a third party
Sustainables 3 Compartment Hinged Lid To Go Food Container
Molded fiber/pulp (plant-based)
Degradation and food contact integrity
Limited concern
Mold or bacterial growth from moisture retention
Limited concern
Lower concern, molded fiber food containers rarely contain PFAS.
⚠Starting grade for this product type
Rubbermaid
TakeAlongs Food Storage Containers 10 Piece Set
polypropylene plastic containers with lids
Microplastics
Limited concern
Leaching from lid components
Limited concern
Mold and bacterial growth in seals
Moderate concern
Lower concern, basic plastic food storage with no known PFAS triggers.
⚠Starting grade for this product type
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.