How to read this list
Three things decide how much a plastic item sheds: heat, friction (scratching, chopping, washing, rubbing) and age. A cold, unscratched plastic container on a shelf releases very little. The same container in the microwave can release millions of particles. So the ranking below is about how you use things, not just what they are made of.
Kitchen
| Item | What happens | Impact |
|---|---|---|
| Plastic containers and pouches, microwaved | Lab tests found more than 2 billion nanoplastics and about 4 million microplastics per square centimeter after 3 minutes of microwaving. | High |
| Plastic ("silky" nylon or PET) tea bags | One bag steeped at 95°C released about 11.6 billion microplastics and 3.1 billion nanoplastics in a 2019 study. | High |
| Plastic kettles and hot-water dispensers | Polypropylene kettles shed particles at levels similar to baby bottles when boiling water. | Medium–high |
| Plastic cutting boards | Estimated 14–79 million particles a year per household, depending on board type and chopping style. | Medium |
| Scratched nonstick (PTFE) pans | Damaged coatings can flake off particles into food. | Medium |
| Disposable cups with plastic linings | Hot drinks in plastic-lined paper cups release particles from the lining. | Medium |
| Cling film, plastic wrap on hot or fatty food | Heat and fat increase migration of particles and additives. | Medium |
| Food stored cold in plastic | Releases far less, but still measurable over months. | Low |
Full details and swaps: Food & kitchen.
Drinks and water
- Bottled water. A 2024 study counted about 240,000 plastic particles per liter on average across three US brands, around 90% of them nanoplastics. Many came from the bottling process itself, not just the bottle. Emerging
- Tap water. Usually contains far fewer particles than bottled water, though results vary by city and pipe material.
- Plastic water bottles reused or left in heat. Squeezing, reusing and warming single-use bottles all increase shedding.
Full details: Drinking water.
Food itself
- Shellfish eaten whole (mussels, oysters, clams), because you eat the gut where particles collect.
- Sea salt, especially from heavily polluted waters.
- Highly processed foods, which pass through plastic tubing, conveyor belts and packaging. Research from consumer groups suggests they carry more particles than minimally processed food.
- Rice, which can pick up particles from plastic packaging. Rinsing before cooking reduces them.
Living room and bedroom
- Synthetic carpets, rugs and upholstery (polyester, nylon, polypropylene) shed fibers into household dust.
- Polyester fleece blankets and bedding are among the heaviest fiber shedders.
- Household dust collects all of these. Indoor air often has more microplastic fibers than outdoor air.
Laundry room and wardrobe
- Synthetic clothing (polyester, nylon, acrylic, elastane) sheds fibers during wear and in every wash. Synthetic textiles are estimated to be the single largest source of primary microplastics reaching the ocean.
- Dryer sheets and dryer lint vented outside release fibers to air.
Full details: Clothing & laundry.
Bathroom
- Cosmetics with polymer ingredients such as polyethylene, nylon-12, acrylates copolymer and polymethyl methacrylate.
- Loose plastic glitter in makeup and crafts.
- Wet wipes, many of which are made with polyester or polypropylene fibers.
- Period products and diapers often contain plastic layers.
- Plastic toothbrushes wear down over time.
Full details: Cosmetics & personal care.
Nursery
- Polypropylene baby bottles released 1.3 to 16.2 million particles per liter when used with hot water in a 2020 study.
- Plastic baby-food pouches and containers, especially if heated.
- Teethers and toys made of soft plastics.
Full details: Babies & kids.
Outdoors and on the road
- Car tires wear into fine particles of synthetic rubber that wash into rivers and float in roadside air.
- Artificial turf with rubber or plastic infill.
- Degrading litter: bags, bottles, packaging and fishing gear broken down by sunlight.
- Plastic mulch films and coated fertilizers in agriculture.
Frequently asked questions
What food has the most microplastics?
Measured levels are generally higher in bottled water, shellfish eaten whole (such as mussels and oysters), sea salt, and highly processed foods that pass through a lot of plastic equipment and packaging. Food heated in plastic picks up the most from packaging.
Do glass bottles have fewer microplastics than plastic bottles?
Usually, but not always. A 2025 study by France's food safety agency, ANSES, found glass-bottled drinks could contain more particles than plastic-bottled ones, traced to paint on the bottle caps. Glass is still the better material for heating and long storage.
Does chewing gum contain plastic?
Most conventional chewing gum uses a synthetic gum base made from polymers similar to those in plastics. Early research suggests chewing releases small amounts of particles. Natural chicle-based gums are an alternative.
Keep reading
Sources
- Qian et al. (2024), Rapid single-particle chemical imaging of nanoplastics, PNAS (bottled water)
- Hernandez et al. (2019), Plastic Teabags Release Billions of Microparticles and Nanoparticles into Tea, Environmental Science & Technology
- American Chemical Society (2023): Cutting boards can produce microparticles when chopping veggies
- University of Nebraska–Lincoln (2023): billions of nanoplastics released when microwaving containers
- Li et al. (2020), Microplastic release from polypropylene feeding bottles, Nature Food
- IUCN (2017): Primary Microplastics in the Oceans