Two questions: 1. What is the big deal about nalgene water bottles? Why do so many people have them? Is it their durability...something about the material? And now, to get more on topic for this forum: 2. Despite not knowing the driving force behind the fad...I bought one myself (yeah, I know, I'm stupid). I realised that I wasn't drinking enough fluids, and thought that staying properly hydrated would allow me to think better and combat the fatigue I encounter often during the semester. Having a one litre bottle would at least encourage me to drink one litre of water per day. But recently I ran across some web articles stating that recent research has shown that the bottles leak a chemical called bisphenol-A, which can cause chromosomal disorders, and is an "endocrine inhibitor", whatever that means. Does anyone know for sure whether these bottles are safe? Should I be drinking one litre of water per day from one?