I'm new here to the forum, but this thread caught my attention since I was also worried about the plastic water bottle risks, and cancer. I found out that this whole "Scare" started with a chain letter that went around on the web some time ago. Everyone check out breakthechain.org. I think this link below will take you right to the area regarding water bottles:

http://www.breakthechain.org/exclusi...erbottles.html

I've been using the polar water bottles mentioned earlier, and haven't encountered any foul, or off tastes after leaving water over night.

run1stride2nd