Footprint (EarthBox line) · Food Packaging
Karat Earth 24oz PLA Hinged Deli Container
Lower-concern option; PLA itself doesn't require PFAS, but verify Footprint's full supply chain transparency before high confidence.
Karat Earth's PLA hinged containers are made from plant-based polylactic acid, which does not inherently contain or require PFAS coatings for basic food contact. However, Footprint does not publicly disclose PFAS-testing results or supply-chain certifications (e.g., MADE SAFE).
Shop Footprint (EarthBox line) on Amazon →Material
PLA (polylactic acid) bioplastic
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
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
This container is PLA (polylactic acid), a plant-derived bioplastic made from corn starch or sugarcane. PLA does not inherently require PFAS additives for food contact performance, unlike some fluorinated polymers. The hinged design is injection-molded PLA with no glazes, coatings, or enamels that would introduce lead or cadmium. The main material concern for PLA is migration of unreacted monomers or plasticizers under heat, though food-grade PLA is formulated to minimize this.
The brand's record and disclosure
Footprint is a known sustainable packaging manufacturer with third-party certifications (BPI compostability, FDA food-contact compliance). However, the brand has not publicly disclosed whether PFAS-free formulations are used across its PLA supply chain, and no independent testing of Karat Earth containers for PFAS has been published. The silence is notable but not disqualifying; Footprint's focus on compostable materials suggests lower reliance on PFAS than conventional plastics, but verification would strengthen confidence.
How it compares in its category
PLA deli containers are generally safer than polystyrene (which can leach styrene) and comparable to PP (polypropylene) in chemical safety, but PLA has lower heat tolerance. This product is marketed as a greener alternative and avoids many hazards of petroleum-based plastics, though compostability claims depend on industrial composting access. For single-use food storage, PLA sits in the mid-to-upper safety range because it avoids BPA and phthalate risk inherent in some rigid plastics.
If you buy it
Do not microwave or expose to temperatures above 50-60°C (122-140°F) because PLA softens and may release trace monomers. Use for cold or room-temperature foods (deli salads, bakery items, prepared foods). Do not reuse for hot liquids. Discard if the container shows cloudiness, cracks, or warping, as these indicate polymer breakdown. If you have access to industrial composting, these containers are a legitimate end-of-life advantage over conventional plastics.
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.”
PLA monomer and oligomer migration
Lactic acid oligomers can migrate into fatty or acidic foods under elevated temperature or prolonged contact; risk is low at room temperature and normal deli use but increases if containers are reheated or washed in hot water above 60°C.
BPA and BPS contamination
PLA formulation does not require BPA or BPS as a plasticizer; no published data suggests Karat Earth containers contain either. This is a genuine material advantage over polycarbonate or some polyester containers.
Phthalate esters
PLA is not typically formulated with phthalates as plasticizers. No recalls or safety alerts for this product class mention phthalate contamination.
Microplastics generation when heated
PLA can fragment and shed microparticles if heated to 70°C or higher, or if mechanically abraded (scratching during washing or stacking). Risk is low for cold-food use but real if containers are washed in dishwashers on hot cycles or reheated.
Degradation and brittleness over storage
PLA degrades faster than polyethylene or polypropylene under UV light, humidity, and warm storage. Containers left in sunlit areas or stored in warm, damp conditions may become brittle within months, though food-contact risk remains low.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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 Food Packaging
World Centric
Compostable Fiber Compost-A-Pak Containers
Fiber-based (wood pulp/molded fiber), compostable coating
Lower-concern choice; compostable fiber with documented PFAS-free commitments, though independent lab confirmation on this specific SKU is absent.
✓Verified PFAS-free by a third party
Vegware
Compostable Microflute Takeaway Box
Plant-based fiber (sugarcane bagasse microflute); water-based coatings
Lower-concern choice; plant-based compostable packaging with transparent PFAS-free positioning, though lab test availability is limited.
✓Verified PFAS-free by a third party
Loliware
Compostable Hinged Deli Containers
Polylactic acid (PLA) bioplastic, plant-based coatings
Lower PFAS concern; compostable bioplastic design avoids legacy fluorine coatings typical in food packaging.
✓Verified PFAS-free by a third party
More food packaging 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.