Recycled paper is often restricted for direct food contact in containers because contaminants from its previous life—like inks, dyes, adhesives, mineral oils (MOH), and plasticizers (phthalates)—don't get fully removed and can migrate into food, posing significant health risks like neurological harm or endocrine disruption. While good for the environment in many ways, the porous nature of paper makes it hard to clean thoroughly, and these chemicals, especially mineral oils from printing, are a major food safety concern.
The correct answer is Because it creates contamination. Recycled paper might contain trace amounts of contaminants from its previous uses, such as inks, dyes, adhesives, or chemicals used in the recycling process. These contaminants could potentially migrate into the food and pose health risks.
BPA is a toxic chemical that is used as a heat-resistant coating on thermal printed materials such as till receipts, shipping labels, flyers, luggage tags, food cartons and boarding passes. When these paper products are recycled into new products (like recycled toilet paper), the BPA remains present.
Health Risks of Single-Use Paper Containers
Chemical Leaching: When hot food is placed in these containers, PFAS and other harmful chemicals can leach into it. This is particularly problematic with fatty, salty, or acidic foods, which can increase the rate of chemical migration.
The FDA requires companies to prove that their recycled plastics are safe for food contact. This requires detailing their recycling process to the FDA and providing official test results that show their recyclable containers meet the contamination guidelines.
No, 40-year-old Tupperware is generally not considered safe for regular food storage, especially for heating, as older plastics (pre-2010) may contain BPA and even heavy metals (lead, arsenic, cadmium) used as colorants, which can leach into food, particularly with wear, scratches, or high heat. It's best to use vintage plastic for non-food purposes (like organizing screws) and switch to modern glass or BPA-free plastic containers for food to avoid potential health risks and bacteria buildup in damaged areas.
Generally, the rule of thumb is to remove as much food residue as possible. For peanut butter jars, this means scraping out the peanut butter with a rubber spatula. It's not necessary to get every last bit of peanut butter out of the jar, but the more you can remove, the better.
The healthiest food storage containers are glass and stainless steel, as they are non-toxic, don't leach chemicals like BPA, and don't absorb odors or stains, making them ideal for non-reactive, safe food storage. Food-grade silicone, ceramic, and bamboo are also great natural options, while specific plastics like #5 Polypropylene (PP) and #2 HDPE are considered safer for reheating if necessary.
👉 A peer-reviewed study found that polypropylene bags like Ziploc can release thousands of microplastics and millions of nanoplastics per square centimeter (Especially when frozen or reheated in the microwave)!
Microplastics Can Be Flushed Out of Your System
“There is definitely reason to believe a lot of it will come out through the feces.” The chemicals from microplastics also “don't stay in the body very long, so if you stop exposure, the levels [in] your body will go down,” added Woodruff.
Plumbers often advise against Charmin because its plush, thick, multi-ply versions don't dissolve quickly, leading to stubborn clogs, especially in older pipes or septic systems, unlike thinner papers that break down easily and allow for smoother flow. While great for comfort, Charmin's durability and high absorbency make it prone to clumping and buildup, creating blockages that can cause significant plumbing problems and costly repairs.
Using recycled fibres in the paper industry is positive for the environment – but the reality is that paper can't be recycled forever. Each time the fibres are recycled, some break down and become too short and weak. So without new fibres coming into the circuit, the paper cycle can't be maintained.
The kidneys – the way we excrete BPA
So, we flush them out more efficiently when we adopt the following habits: Stay well-hydrated by drinking lots of filtered water (ideally from stainless steel or glass water bottles). Eat kidney-friendly foods, such as celery, cucumber, carrot, watermelon, coconut water and parsley.
To avoid contaminating clean materials, it is good practice to cut off the clean tops of your pizza boxes to send to recycling but dispose of the greasy bottoms in the trash.
Food grade paper refers to paper products that are safe for direct contact with food. This means the paper is free from harmful chemicals, toxins, or residues that could contaminate food and pose health risks.
The total generation of paper and paperboard in MSW was 67.4 million tons in 2018, which was 23.1 percent of total MSW generation that year. Approximately 46 million tons of paper and paperboard were recycled in 2018 for a recycling rate of 68.2 percent, which was the highest compared to other materials in MSW.
Even if plastic wrap or lids aren't in direct contact with your food, they can still leach microplastics when heated in the microwave. Most plastic covers also warp over time, which means they may no longer fit properly on your containers—making reheating messier and less efficient.
“Companies like SC [Johnson] and Bimbo are deliberately tricking consumers into thinking that they can buy Ziploc's or Bimbo's plastic bags without contributing to plastic waste or other related environmental harms because those products can (at least in theory) be recycled,” the complaint reads.
Many items seem recyclable but aren't, including soft plastics (chip bags, bread bags), soiled paper/cardboard (greasy pizza boxes, paper towels, tissues), small items (bottle caps, straws), ceramics/Pyrex, batteries, Styrofoam, nappies, and some mixed-material containers (coffee cups with plastic lining), as these contaminate loads or jam machinery, requiring special disposal.
It's a personal choice—glass is more durable and recyclable, but also more expensive. Plastic is typically budget-conscious and lightweight, but it's not exactly sustainable. Whatever your needs are, we tested the best freezer containers for soup, meal prep, and more.
Use an Airtight Container, Keep in Cool and Dry Place
All types of flour should be stored in an airtight container after opening. It'll keep roughly the same length of time as an open package (about a year), but the advantage is that the container will keep out air, humidity, and pesky bugs and critters.
The safest plastic food storage containers are HDPE, LDPE, and PP plastics. These include juice and milk jugs, grocery bags, bread bags, produce bags, and food storage boxes. Food can be stored in these types of plastic containers without any toxins leaking.
Items Containing Soap
Don't worry about rinsing these bottles out to remove the soapy residue. In fact, it may benefit some recyclers if you leave the soapy residue in the bottle. Many recyclers rely on this soap to clean the plastic products that are being processed at their facilities.
An open jar of peanut butter stays fresh up to three months in the pantry. After that, it's recommended to store the peanut butter in the fridge (where it can maintain its quality for another 3-4 months). If you don't refrigerate, oil separation can occur.
Metal lids and caps on glass containers (for example, metal jam jar lids) can be left on and recycled with glass.