Can microplastics from plastic containers amplify disinfection byproduct toxicity?
Yes, in a cell study. A 2025 Food Chem study found micro- and nanoplastics released from plastic containers amplified the toxic response of drinking-water disinfection byproducts in human cells.
What is being tested
Tap water is disinfected to kill germs. That process can form disinfection byproducts, or DBPs. Plastic containers can also release microplastics and nanoplastics, especially after hot-water contact.
The key question is not just what each exposure does alone. It is what happens when plastic particles and DBPs meet in the same cells.
What the research says
A 2025 study in Food Chem tested micro- and nanoplastics released from feeding bottles, food containers, and paper cups after hot-water treatment. The study reported about 10^4 microplastics and 10^7 nanoplastics released after that treatment.
The released particles were not toxic by themselves in 6 tested cell types. But they amplified the toxicity of disinfection byproducts. The strongest reported synergy was 57.89% plus or minus 4.64% in HepG2 cells exposed to nanoplastics from feeding bottles and iodoacetamide.
This is a lab cell study, not a direct test of drinking from one container at home. Still, it supports a simple habit: do not add hot water to plastic food containers when glass is available.
Safer next steps
Use glass storage for hot water, soups, and leftovers. Let food cool before placing it in plastic if plastic is your only option. Do not pour boiling water into plastic pitchers or food containers.