I just did some research on plastics and discovered that my nalgene bottle contains horrible chemicals that have been leaching into my water. It contains plastic #7. I wrote up some info on it with a number of links if you are interested in learning more. Please be careful what plastics you use for your family and children.
http://thriftysoaper.blogspot.com/
Erin
(did my link work, it looks funny to me?)