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Microplastics released from disposable food containers: characterization by micro-FTIR and estimation of dietary exposure
Summary
Disposable food containers—like the ones your delivery meals come in—shed thousands of tiny plastic fragments into your food each year, with one study estimating around 3,478 microplastic pieces annually from a typical Korean soup delivery order. The main culprit seems to be surface scratching on the plastic, meaning bigger, more worn containers release more particles. The takeaway: switching to reusable containers when possible could meaningfully cut down your microplastic exposure from food packaging.
Abstract The rapid global shift toward the use of disposable food containers during and after the COVID-19 pandemic has raised critical concerns regarding microplastic contamination in food. This study systematically evaluated microplastic release from commonly used food containers and examined key factors affecting the quantity and characteristics of released microplastics. Containers of various sizes, shapes, and material compositions were analyzed using standardized procedures followed by micro-FTIR for polymer identification and particle quantification. Disposable containers exhibited significantly higher microplastic release than reusable containers ( p < 0.05). Polyethylene terephthalate was the most prevalent polymer type, accounting for 48% of total microplastic pieces, while fragments in the 20–49 μm range were the most abundant (45%). Meanwhile, the internal surface area of the containers correlated positively with microplastic release ( r = 0.699, p = 0.00259, n = 16), suggesting surface abrasion as the predominant mechanism of microplastic generation. Based on these measurements, a standard Korean soup set was estimated to expose consumers to approximately 3,478 microplastic fragments annually, indicating substantial microplastic exposure from delivered meals. These findings underscore the importance of raising public awareness of microplastic exposure, while supporting the adoption of reusable containers as a practical strategy to mitigate consumer risk.