Water you supposed to do?

Buy a lined aluminum, stainless steel, or glass container for your water.

The evidence is not conclusive, but there are indications that re-using plastic water bottles may be bad for you. http://www.goaskalice.columbia.edu/2178.html.

Don't just keep buying new bottles of water though -- plastic water bottles require 1.5 million barrels of oil each year to make.

A good alternative is to use a container that is safe to wash & re-use. Using such a bottle will not only protect your health but will also help protect the environment. Click here for more info on some types of bottles that are good for re-use: http://www.idealbite.com/tiplibrary/archives/bottled_up1/.