How does reusing plastic water bottles affect the migration of chemicals into water?

Summary

Reusing plastic water bottles may cause more tiny plastic particles (microplastics) and potentially harmful chemicals to leach into your water over time, according to a review that pulled together existing research on the topic. While the science on this is still fairly limited, it's a good reminder to wash reusable bottles regularly, replace ones that show wear, and consider glass or stainless steel alternatives if you're concerned about long-term chemical exposure.