PFAS in Food Packaging: What's Really in Your Wrappers, Cups, and Takeout Containers?

If you've grabbed a burger wrapper, a paper coffee cup, or a molded-fiber salad bowl this week, there's a reasonable chance it came into contact with PFAS — the "forever chemicals" used for decades to make packaging grease- and water-resistant. Based on available materials and data, this remains one of the most common everyday exposure routes to PFAS, even as many major chains and manufacturers have announced phase-outs.

What Exactly Is the Issue With PFAS in Food Packaging?

Per- and polyfluoroalkyl substances (PFAS) are a class of thousands of synthetic chemicals prized for repelling oil, grease, and moisture. For decades, manufacturers applied PFAS coatings to paper and molded-fiber food packaging — think French fry boxes, pizza boxes, microwave popcorn bags, and pastry wrappers — to keep grease from soaking through.

The concern is twofold. First, PFAS can migrate from packaging into food, especially warm, greasy, or acidic items. Second, discarded packaging contributes to environmental PFAS contamination in soil and water as it breaks down in landfills or composting streams. Because PFAS chemical bonds are extremely stable, they don't readily degrade — hence "forever chemicals."

Why Would Packaging Companies Use These Chemicals in the First Place?

PFAS were historically cheap, effective, and FDA-approved for food-contact use going back to the 1960s. They allowed thinner paper products to hold up against oily foods without needing plastic laminates. It wasn't until independent research in the 2000s and 2010s — much of it from university labs and organizations like the Environmental Working Group (EWG) and Silent Spring Institute — that PFAS in wrappers and cups drew regulatory attention.

Which Brands and Products Have Been Linked to PFAS?

Testing by independent labs, university researchers, and investigative outlets has found PFAS indicators (often measured as total fluorine) in packaging from a range of restaurants and retailers over the years. It's important to note that presence of fluorine is a screening indicator, not definitive proof of a specific PFAS compound, and formulations change over time.

• Fast food wrappers and bags: Past independent studies (including a widely cited 2017 study published in Environmental Science & Technology Letters) found detectable fluorine in wrappers and bags from several major chains, including some products from McDonald's, Burger King, and Chick-fil-A. Many of these companies have since publicly committed to phasing out PFAS in packaging.
• Molded-fiber bowls and clamshells: Compostable-looking fiber bowls (common at fast-casual salad and grain-bowl chains) have historically used PFAS to add grease resistance. Sweetgreen and Chipotle have both stated they've removed or are removing added PFAS from packaging, according to brand statements — these are brand-stated claims, not independently re-verified in every case.
• Paper cups: The plastic lining in most hot beverage cups is typically polyethylene, not PFAS, but some cup lids and cup coatings have tested positive for fluorine in independent surveys. Brand-by-brand data is limited and inconsistent.
• Microwave popcorn bags: Historically one of the highest-PFAS packaging categories due to grease-resistance needs; several manufacturers have reformulated in response to regulatory pressure and consumer studies.
• Grocery store bakery bags and deli paper: Testing by state environmental agencies (notably in California and Washington) has found fluorine indicators in store-brand bakery and deli packaging at various retailers, though results vary by store and batch.

For a broader look at specific products tested for PFAS, visit our PFAS Product Finder, which compiles available third-party and brand-disclosed data.

Have Any Companies Actually Removed PFAS?

Yes — based on public statements and regulatory filings, several major restaurant chains and packaging suppliers have announced PFAS phase-out commitments, generally targeting 2020–2025 timelines. McDonald's, Burger King (Restaurant Brands International), Wendy's, Sweetgreen, and Trader Joe's have all made public statements about eliminating intentionally added PFAS from packaging. These are brand-stated commitments; independent, product-by-product verification is not always publicly available, and enforcement/testing varies by state.

How Risky Is This, Honestly?

This is where nuance matters. Based on available data, the risk from any single greasy wrapper or cup is likely low in isolation, but food packaging is considered one of several cumulative, everyday PFAS exposure sources — alongside drinking water, certain non-stick cookware, and stain-resistant textiles.

Human health research has found associations between elevated blood PFAS levels and outcomes including changes in cholesterol, immune response, thyroid function, and certain cancers in some studies. It is critical to note that association is not the same as causation, and most population studies cannot isolate food packaging as the specific exposure source. The science is still evolving, and risk likely depends on cumulative, long-term exposure rather than occasional contact.

Regulatory bodies have responded unevenly: the FDA announced in 2024 that grease-proofing PFAS substances were no longer being sold for food-contact use in the U.S. market by manufacturers, but this does not guarantee zero PFAS in all packaging already in circulation or imported.

Which Packaging Types Carry More Concern Than Others?

What Should You Actually Do or Buy Instead?

You don't need to panic, but a few practical habits can meaningfully reduce exposure based on current understanding:

• Transfer greasy takeout food to a plate or glass container as soon as possible rather than letting it sit in wrappers or boxes.
• Avoid microwaving food directly in packaging — heat can increase migration of chemicals from paper or coatings into food.
• Choose brands with public PFAS phase-out commitments, while remembering these are company statements, not always lab-verified.
• Favor uncoated paper or reusable containers at home — stainless steel, glass, and silicone are generally lower-concern alternatives based on current data.
• Check our methodology page to understand how we assess and rate packaging and products, since testing standards and detection limits vary widely between studies.

Bottom Line

PFAS has been widely used in grease-resistant food packaging for decades, and based on available data, many popular fast food and grocery products have historically tested positive for fluorine indicators. Multiple major brands have announced phase-outs, but independent, product-level verification remains incomplete and inconsistent across the industry. The health risk from any single exposure is likely low, but cumulative daily contact with treated packaging is a reasonable, evidence-based concern worth minimizing. Simple habits — like transferring food out of wrappers and choosing reusable containers — can meaningfully reduce your exposure while the science and regulations continue to evolve.

FAQ

Is it dangerous to eat food that touched PFAS-treated packaging once?

Based on available research, occasional exposure is considered low concern by most public health agencies. Risk appears more closely tied to repeated, long-term exposure across multiple sources, not a single meal.

How can I tell if a wrapper or container has PFAS?

You generally can't tell by looking or touching. Grease-resistant coatings that resist oil stains are more likely to have used PFAS historically, but only lab testing (measuring total fluorine or specific PFAS compounds) can confirm presence. Brand claims of being "PFAS-free" are self-reported unless backed by cited third-party testing.

Are compostable or "eco-friendly" containers automatically PFAS-free?

Not necessarily. Some molded-fiber and compostable-labeled containers have historically used PFAS for grease resistance, which can also complicate composting since PFAS doesn't break down. Look for specific "no added PFAS" claims rather than assuming compostable equals PFAS-free.