Can bottled drinks shed more microplastics than tap water?
Yes, bottled drinks can release microplastics from packaging. A 2026 bottled-drink study found temperature and acidity increased release, while a separate study found bottled water had more particles than treated tap water in sampled brands.
What's actually in it
Bottled drinks often sit in PET or polypropylene packaging. Plastic particles can come from the bottle, cap, or processing equipment.
Storage matters. Heat, freezing, shaking, and acidic drinks can make packaging shed more particles.
What the research says
A 2026 study in Science of the Total Environment tested 14 commercial bottled beverages, including water, milk, cola, juice, vinegar, and oral hygiene solutions. Extreme temperatures, both freezing and heating, increased microplastic release. Low-pH drinks such as fizzy drinks and vinegar also had higher microplastic loads.
The study found PET and polypropylene were the dominant polymer types. Average hazard index values for adults were below 1, but children often exceeded that threshold at the 95th percentile, especially when consuming heat-exposed water.
A 2026 study in Science of the Total Environment found bottled water had significantly higher microplastic and nanoplastic particle concentrations than treated drinking water in the samples tested.
This does not mean tap water is always perfect. It does mean bottled drinks are not a low-plastic default. Glass and stainless steel are better daily choices for drinks when you can choose.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Unbottling the risk: Microplastic release and health hazards from bottled drinks. | Sci Total Environ | 2026 |
| What's in your water? A comparative analysis of micro- and nanoplastics in treated drinking water and bottled water. | Sci Total Environ | 2026 |