Are any of you overly concerned with the potential leaching of Bisphenol A from your plastic bottles (those of you who have them, at least)? I was reading up on the topic ever since I've gotten back to the gym and found some interesting info. Apparently, the #7 in a triangle stands for polycarbonate plastic which usually contains BPA. This article advertises aluminum and stainless steel bottles as the best choice. http://www.nrdc.org/thisgreenlife/0902.asp Other reports claim the leaching from the bottles is minimal after supposedly exposing them to brutal conditions. http://walking.about.com/od/hydration/f/bpafree.htm A third source actually claims BPA-free bottles are even more dangerous than their BPA counterparts. http://blogs.babble.com/strollerderby/2011/05/09/bpa-free-plastics-may-actually-be-more-dangerous/ What is everyone's opinion on this BPA craze? I've bought at least 3 different bottles in the last month, one of them BPA-free.