I police a University that has a professor that is one of the forerunners in this research. I use the white Nygene Bottles with the #2 on the bottom of it. The number 2 has a recycle symbol around it. Number 7 is the number that has the chemicals that those are concerned of.

I don't put hot water in my number 7 bottles, however there are studies that show that continuous washing can release the chemical.

But then again this comes from a hiker that is worried about getting cancer from a bottle yet I smoke...lol.


Tom