The myth about glass bottles has just been debunked. Confirmation.
Author: BM • Source: Rynek Zdrowia • Published: August 10, 2025 10:55 PM • Updated: August 10, 2025 10:55 PM
Glass bottle advocates may be surprised. Contrary to appearances, glass bottles contain as much as 50 times more microplastics than plastic bottles. The myth that glass bottles are safer than plastic bottles has been debunked. According to research conducted in France, an average of 100 microplastic particles per liter of beverage was detected in each glass bottle tested.
- According to research conducted by French researchers, the main source of microplastics in glass bottles is probably the bottle caps.
- This is mainly due to the paint used to cover the caps.
- However, the use of advanced cap cleaning methods effectively reduces the amount of microplastic released
TVN24 reported a study by the French government agency ANSES that the content of microplastics in drinks stored in glass bottles is up to 50 times higher than in their plastic or metal counterparts.
It turns out that on average, each glass bottle tested contained 100 microplastic particles per liter of beverage. This is five to fifty times more than the alternatives.
Researchers didn't stop there and began searching for the cause of the high concentration of microplastics in glass bottles. They hypothesize that the bottle caps, or more specifically, the paint on them, are likely responsible.
Further analysis by the team also revealed that the color of the particles found in the beverages matched the color of the paint on the bottle caps, further supporting this theory. To confirm this hypothesis, the ANSES laboratory conducted a series of tests using different bottle cap cleaning methods.
The researchers tested three scenarios, of which the most effective method was:
- cleaning bottles,
- filling them with filtered water,
- putting on caps that were first pressure cleaned and then rinsed with filtered water and alcohol.
As a result of the advanced cleaning method, the amount of released microplastic decreased significantly: from 287 particles per liter to 87. This means that thorough cleaning of bottle caps is an effective way to reduce the presence of microplastics in bottled beverages in glass. Trace amounts of microplastics have also been detected in cork-sealed wine.
Although the impact of microplastics on human tissues has not yet been fully researched, scientists warn that once they enter the body, they may disrupt the functioning of:
- respiratory system,
- immune system and even
- affect fertility.
Ways microplastics enter:
- frees himself from clothes,
- everyday items,
- water bottles,
- tea bags.
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