Glass bottles have long been viewed as the healthier, more eco-conscious alternative to plastic. But new scientific findings suggest we may need to rethink that assumption. A recent study by France’s National Agency for Food, Environmental and Occupational Health & Safety (ANSES) reveals something shocking: glass bottles can contain up to 50 times more microplastics than their plastic counterparts.

The Hidden Source of Contamination: It’s Not the Glass Itself
The culprit isn’t the glass material, but rather the painted metal caps used to seal these bottles. The study found that decorative paint on the underside of the caps often sheds microscopic plastic particles, which end up in the beverages. In fact, the researchers detected about 100 microplastic particles per liter in glass-bottled drinks—a level far higher than what they found in plastic bottles or aluminum cans.

Supporting Research From High-Authority Sources
This surprising discovery has been validated and echoed by multiple high-authority outlets:

  • The Washington Post published a comprehensive overview of the study, placing it in the broader context of food packaging contamination. It confirms that painted bottle caps are a significant source of microplastic pollution.
  • ScienceAlert provides in-depth analysis of the particle counts, reinforcing ANSES’s findings and highlighting the role of cap materials.
  • Sustainability Times broke the story highlighting the ANSES study, sparking concern among global health advocates and reinforcing the call for better water safety.

Why This Matters to Homeowners and Health-Conscious Consumers
If you’re buying glass bottles to avoid plastic exposure, these findings should give you pause. Microplastics are linked to a growing list of health concerns, including inflammation, hormone disruption, and potential long-term effects we’re only beginning to understand. What you put into your body matters, and that includes your water.

The Safer Alternative: Ultrapure Drinking Water at Home
Rather than relying on bottled water—glass or plastic—a better approach is to take control of your water quality at home. At Dierolf Plumbing and Water Treatment, we specialize in reverse osmosis systems that:

  • Remove microplastics and other contaminants
  • Deliver consistently clean, great-tasting water
  • Eliminate the need for disposable bottles altogether

Take the First Step Toward Safer Water
We offer complimentary water testing and expert system design to ensure your family gets the best. Stop guessing what’s in your bottle. Know what’s in your tap.

Schedule Your Free Water Test Today

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Final Thoughts
Glass may look clean and safe, but even the most trusted materials can carry hidden risks. With the right filtration system, you can cut through the uncertainty and enjoy water you trust—straight from your tap.

Get diagnosed by a water expert today

Contact us to learn more about how we can help you in southeastern Pennsylvania.

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