Polystyrene tray or cup
High releasePolystyrene / expanded polystyrene (#6)
The short answer
Brittle, easily abraded and used mainly for raw meat trays and hot drinks. Research on packaged meat has specifically implicated polystyrene trays as a microplastic source, and it performs badly with heat.
What actually drives release
- Brittle polymer that abrades and flakes readily
- Large contact area with moist food such as raw meat
- Poor heat tolerance, so hot liquids degrade it
When it gets worse
- Holding hot drinks or soup
- In contact with fatty raw meat over several days
- Reused after any scratching
Better options
- Butcher paper from a counter
- Glass or steel container
- Ceramic mug
Where you'll find it
Raw meat traysTakeaway hot cupsEgg cartonsInstant noodle pots
Scan what you actually buy
Packaging changes the answer more than the brand does. Scan your product with MicroPlastics for a 0–100 exposure score and a lower-plastic version of the same thing.
Scan my productFrequently Asked Questions
Does polystyrene leach microplastics?
Brittle, easily abraded and used mainly for raw meat trays and hot drinks. Research on packaged meat has specifically implicated polystyrene trays as a microplastic source, and it performs badly with heat.
What makes polystyrene tray or cup worse?
Holding hot drinks or soup. In contact with fatty raw meat over several days. Reused after any scratching.
What should I use instead of polystyrene tray or cup?
In order of preference: Butcher paper from a counter, Glass or steel container, Ceramic mug. Packaging is usually the cheapest variable to change in any product decision.
Sources
- Earth Action with rePurpose Global (2026). Microplastic migration from food and beverage packaging (reported May 2026). Forbes.
- Qian N, Gao X, Lang X, et al. (2024). Rapid single-particle chemical imaging of nanoplastics by SRS microscopy. Proceedings of the National Academy of Sciences (PNAS).
- Winkler A, Santo N, Ortenzi MA, et al. (2022). Does mechanical stress cause microplastic release from plastic water bottles?. Water Research.
- Hernandez LM, Xu EG, Larsson HCE, et al. (2019). Plastic teabags release billions of microparticles and nanoparticles into tea. Environmental Science & Technology.