Solo · Disposable Food Containers
Dart Solo Hinged Food Take-Out Container
Hinged containers typically use water and grease barriers.
Dart Solo doesn't disclose PFAS status or coating chemistry for this product. Molded fiber food containers frequently get water and grease-resistant treatments that may contain PFAS.
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
molded fiber pulp, possible grease-resistant coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Dart Solo Hinged Food Take-Out Container is made of, ingredients and materials
Dart Solo hinged containers are molded from virgin or recycled fiber pulp, a cellulose-based material formed under heat and pressure. The interior and exterior are typically coated with a water and grease-resistant barrier to prevent seepage and oil penetration, though Solo does not publicly disclose the chemical composition of this coating. Molded fiber itself is generally inert, but the barrier coating is the primary chemical concern for food contact, especially with fatty or hot foods that can accelerate migration.
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.
Water and grease-resistant coating (composition undisclosed)
Molded fiber hinged containers commonly use fluorochemical barriers for water and grease repellency. Solo does not disclose coating chemistry; PFAS presence is unconfirmed but plausible given industry standard practices. Risk increases with fatty foods and elevated temperatures.
Coating migration with heat or extended contact
Molded fiber coatings can leach into food when exposed to heat, fatty solvents, or prolonged contact. Industry testing (e.g., FDA migration studies) has detected barrier-coating residues in food simulants under worst-case conditions. Risk is low for room-temperature, short-duration use but rises with hot or high-fat contents.
Recycled fiber contaminants (if product uses post-consumer waste)
If the molded fiber incorporates recycled content, residual inks, dyes, or adhesives from prior paper uses could theoretically transfer to food. Solo does not specify whether hinged containers use virgin or recycled fiber. Regulatory limits (FDA) apply, but transparency is absent.
What’s reassuring
Microplastic or fiber shedding
No documented evidence of microplastic release from Solo molded fiber containers during normal use. The compressed pulp matrix is stable; concerns arise only if the container is physically damaged, crushed, or deteriorates over extended storage.
Formaldehyde / VOCs
Molded fiber pulp is typically bonded using natural starches or synthetic binders that are cured at high temperature. Formaldehyde-containing resins are not standard in molded foodware, but Solo does not provide material specifications to rule this out entirely.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Dart Container Corporation (Solo parent company) does not maintain publicly available safety certifications or ingredient disclosure for molded fiber food containers beyond FDA compliance statements. The company has faced no widely documented recalls for chemical contamination of hinged containers. Solo's silence on PFAS use in grease-barrier coatings is consistent with industry opacity on this topic; competitors similarly withhold specifics, suggesting potential reliance on PFAS "forever chemicals" (PFAS) as water-repellent agents, though this is not confirmed for this specific product line.
How it compares in its category
Molded fiber hinged containers occupy a middle ground, they avoid BPA and phthalates inherent to rigid plastics, but their grease-resistant coatings are a known vector for PFAS in the takeout container market. Paper-based containers without water barriers (e.g., uncoated kraft) eliminate coating risks but fail for greasy foods. Rigid plastic (PP or PET) alternatives often use explicit PFAS-free claims. Solo containers are standard foodservice grade but lack transparency that would distinguish them from competitors on chemical safety.
If you buy it
Restrict use to room-temperature or cool foods; do not microwave or place hot items directly in the container, as heat can increase leaching from the barrier coating. Inspect the interior for cracks, peeling, or discoloration before each use; replace containers showing visible coating degradation. For fatty foods (cheese, meat, baked goods), keep contact time under 4 hours if possible. Store away from direct sunlight and strong odors, which can compromise fiber and coating integrity over time.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Solo has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Dart Solo Hinged Food Take-Out Container?
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- Compostable resin (PLA/PBAT blend, plant-based)
- A third party reports verifying it as PFAS-free
- Thermal degradation and chemical release at use temperatures
- Sugarcane bagasse (compostable fiber)
- We found no PFAS statement from the brand
- Bleaching agents and residual processing chemicals
3 hazards checked on this product, all on its full breakdown.
- polypropylene (PP) container, uncoated
- We found no PFAS statement from the brand
- Microplastics
2 hazards checked on this product, all on its full breakdown.
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.