The Safety of Plastic Water Bottles

I have been using a #7 bottle (Nalgene) every weekday for the past 3 years.

Some bottles with the number 7 indicate that the bottle contains bisphenol A, a chemical linked to reproductive and fertility problems.
“The bottles with the numbers 3, 6 and 7 are not safe for use across the board,” said Dr. Leo Trasande of the Mount Sinai School of Medicine.