Grease-Resistant Wrappers and Burger Boxes
Fast-food wrappers and takeout boxes are no longer being made with certain grease-proofing PFAS as of February 2024, when the FDA completed a voluntary phase-out. Yet items still in circulation may carry these chemicals. Detection frequencies varied among packaging types, with roughly 46 percent of food contact papers testing positive for fluorine in earlier studies.
These wrappers coat burgers, sandwiches, and breakfast items with thin layers of water and oil repellent chemistry. Heating PFAS chemicals increases the risk of contamination, which matters because fast food typically comes out hot and stays wrapped until you eat it. I’ve seen enough greasy burger wrappers to know that whatever keeps the paper from disintegrating is probably doing the same to our bodies.
Even though manufacturers have agreed to stop adding these substances to new packaging, FDA estimates that there may be lingering stocks of packaging that contains PFAS, and it may take some months before that stock is completely exhausted. Translation? Your drive-through order might still arrive in yesterday’s chemistry experiment.
Microwave Popcorn Bags
Grease-resistant paper used in microwave popcorn bags has historically been a consistent source of PFAS exposure. The coating keeps butter or oil from soaking through, but the heat from microwaving can accelerate migration into the kernels you’re about to eat. This is one of those products where convenience comes with a hidden chemical load.
People who reported eating microwave popcorn the day before having their blood taken had higher amounts of PFAS in their blood. That’s a pretty direct link. The industry reformulated many of these products after public pressure, yet older inventory and off-brand options may still carry the original formulations.
Not every popcorn bag is suspect. Some brands switched to alternative coatings years ago. The trouble is you often can’t tell from the outside. If the packaging feels unusually slick or resists grease stains completely, that’s your clue.
Molded Fiber Bowls Marketed as ‘Compostable’
Here’s the really frustrating part. Molded fiber products such as bowls, plates and food boxes advertised as biodegradable or compostable disposable had the highest PFAS concentrations consistently. These are the brown, earthy-looking bowls you get at Sweetgreen or Chipotle, presented as eco-friendly choices.
According to experts, all molded fiber bowls contain PFAS, even when they’re certified compostable. The chemicals prevent hot salad dressing or grain bowl liquids from turning the container into mush. Without PFAS, they would break down almost immediately. So the very feature that makes them functional also makes them environmentally persistent.
Molded fiber bowls and trays have the most total fluorine, and those containers are advertised as compostable and could spread PFAS to crops through that compost. That’s not circular, that’s contamination with a green label slapped on it. Did you expect your salad bowl to betray you?
Pizza Boxes and Bakery Bags
Pizza boxes and candy wrappers are among the grease-resistant paper packaging that can contain PFAS. Pizza boxes need to handle hot cheese and oil without falling apart, so manufacturers historically treated the paperboard with fluorinated coatings. Some have switched to wax-based or mechanical compression alternatives, but many haven’t.
Supermarket cookie and bakery bags and microwavable popcorn packaging were among items that contained PFAS in testing from UK retailers and takeaways. The key issue is that baked goods tend to sit in these packages for extended periods, and fat-rich foods like pastries can absorb more of the migrating chemicals.
Paper that feels unusually smooth or seems to resist grease better than plain paper is likely treated. Some food chains are reverting to old packaging methods, such as wrapping a food item twice in uncoated paper or using wax-coated packaging. It’s less convenient, but at least you know what you’re getting.
French Fry Containers and Side-Dish Bags
Paper bags used for fries or other sides had the highest levels of PFAS in some consumer testing. Fries are greasy, hot, and they stay in direct contact with the bag while you drive home or eat in the car. That’s a perfect storm for chemical migration.
The reason these bags get treated so heavily is obvious when you think about it. Untreated paper would become translucent and soggy within seconds of contact with hot oil. Still, the alternative coatings available now work reasonably well. The question is whether your favorite chain has made the switch.
Testing from major chains in recent years shows uneven progress. Popeyes french fries wrapper tested at 25 ppm organic fluorine in some locations after January 2023, which is under California’s 100 ppm limit but still present. That’s progress, I suppose, but not elimination.
Single-Use Paper Plates and Trays
PFAS were found in packaging from paper bags for french fries and wrappers for hamburgers to molded fiber salad bowls and single-use paper plates. Paper plates used at picnics, food courts, or catered events often carry coatings to prevent sogginess. You wouldn’t want your barbecue plate collapsing mid-meal, so manufacturers treat them.
The coating might be invisible, but Organic fluorine was detected in more than half the food packaging tested, with almost a third having levels above 20 ppm and 22 above 100 ppm. Some of the worst offenders were disposable plates used at high-volume events. The cheaper the product, the more likely it still uses older formulations.
Third-party certification programs exist, but they’re not widespread. Only two companies have become certified under Clean Production Action’s GreenScreen food packaging initiative so far. So unless you see a label, you’re guessing.
Take-Out Containers from Restaurants
Take-out containers vary wildly depending on the material. Takeout containers and paper trays had some of the lowest PFAS levels compared to other food packaging types, which is somewhat reassuring. Clamshell containers made from molded fiber, however, are a different story.
The longer food sits in packaging, the more likely it is that PFAS will migrate to your food, especially if the food is warm and comes in paper bags or molded fiber bowls. If you order delivery and your meal sits in the container for 30 minutes during transit, that’s extended exposure time.
Some chains publicly committed to phase out PFAS years ago. Restaurant Brands International, the parent company of Burger King, Popeyes and Tim Hortons, announced bans on the use of PFAS in its food packaging by the end of 2025 or sooner. Others made no such promises. Knowing where your food comes from matters.
Candy Wrappers and Snack Packaging
Candy wrappers are among the grease-resistant paper packaging that has historically contained PFAS. These are often coated to protect chocolate or sticky candies from moisture and to keep oils from staining the exterior. The wrappers are thin, which means a higher surface-area-to-food ratio, increasing the chance of migration.
In March 2024, research found 68 PFAS in food packaging, and only 39 of these had testing data to check for hazards, with the majority not detailed in regulatory or industry documents. So even when companies say they’re reformulating, we often don’t know what’s replacing the old chemicals.
Snack packaging for chips, crackers, and pastries often gets similar treatment. If the interior of the bag feels slippery or coated, that’s typically a fluorinated surface. It’s hard to say for sure. Honestly, the lack of transparency here is maddening.
Paper Coffee Cups and Beverage Sleeves
Detection frequencies for PFAS ranged from 0 percent for paper cups in some studies to higher percentages in food contact papers. Coffee cups are usually lined with polyethylene to prevent leaking, which doesn’t typically contain PFAS. However, some manufacturers also treat the outer paperboard with fluorinated coatings for structural integrity when the cup gets hot and damp.
Beverage sleeves, on the other hand, are often plain paper and less likely to be treated. The main risk with coffee cups comes from lids or specialty cups used for cold beverages, where coatings might be applied differently. Testing varies by brand and location.
The good news? The FDA’s food studies have shown that food packaging materials like fast-food wrappers, microwave popcorn bags and take-out pizza boxes were a major source of dietary exposure to certain types of PFAS, but paper cups were not highlighted as a top concern. Still, reusable mugs are the safest bet if you drink coffee daily.
State Bans and What They Mean for Consumers
New York’s ban on PFAS in food packaging took effect in December 2022, Washington’s ban in 2023, and Minnesota’s ban in January 2024. These state-level restrictions apply to plant-fiber packaging and set limits on intentionally added PFAS. If you live in one of these states, your takeout is statistically safer now.
Twenty states now ban PFAS in any paper food packaging, with more set to follow in 2027. Federal action remains limited, so geography matters. A burger wrapper in California is subject to different rules than one in Texas. That’s frustrating if you travel or order from national chains.
Federal actions addressed grease-proofing agents on paper via voluntary phase-outs, while state laws create binding, enforceable prohibitions and help close loopholes, cover imports, and maintain uniformity. The patchwork means progress is uneven. What’s banned in one state might still be perfectly legal next door. It’s worth checking what applies where you live.
