We have all been told about the benefits of drinking water out of a reusable bottle. It’s convenient, better for the environment than single-use bottles, and increases your daily water intake. However, if your reusable water bottle is made out of plastic, it may be more damaging to your health than it is beneficial. In a recent study, chemists at the University of Copenhagen discovered that tap water that gets stored in reusable plastic bottles contains hundreds and sometimes thousands of chemicals; many that are damaging to human health, and many more that have unknown toxicity.
The chemists tested three different types of popular plastic water bottles, two of which were biodegradable. The researchers stored tap water in both used and new bottles for 24 hours. Some of the bottles had been machine washed, some had not, and some had been rinsed 5 times with tap water. They then tested the water in the bottles for a variety of chemicals.
Shockingly, after just 24 hours, the researchers found hundreds of substances present in the tap water stored in the new bottles—including substances that had never been found in plastic. Worse still, they discovered THOUSANDS of substances in the water stored in bottles that had been through a dishwasher cycle. And even the tap water stored in thoroughly rinsed bottles contained a significant percentage of toxic and unknown substances. More than 400 of the substances were derived from plastic and 3500 from dishwashing soap.