I was reading the Wikipedia article on bisphenol A, the compound found in the hard clear (lexan)Nalgene bottles that has been getting so much press lately. I have always preferred the softer milky Nalgenes because they are lighter and more durable.
The plastics marked “7” are the ones there seems to be concerns about. The soft milky Nalgene bottles are marked with a “2” which according to this article, “Types 2, 4, and 5 (HDPE, LDPE, and Polypropylene, respectively) are believed to not leach chemicals in any significant amount.”
highly informative
keep up the good work