Glass bottle or jar
NegligibleSoda-lime or borosilicate glass
The short answer
The cleanest widely available format. No polymer touches the contents at all except the cap liner, which is a tiny sealing surface. If a product is sold in both glass and plastic, the glass version is the answer.
What actually drives release
- A small polymer or foil cap liner, the only plastic in the system
When it gets worse
- Effectively nothing at household scale, beyond breakage risk
Better options
- Already the best option — keep and reuse the jar
Where you'll find it
Premium bottled waterJarred saucesYogurtOlive oilBaby food
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
Is glass packaging free of microplastics?
The cleanest widely available format. No polymer touches the contents at all except the cap liner, which is a tiny sealing surface. If a product is sold in both glass and plastic, the glass version is the answer.
What makes glass bottle or jar worse?
Effectively nothing at household scale, beyond breakage risk.
What should I use instead of glass bottle or jar?
In order of preference: Already the best option — keep and reuse the jar. 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.