Are Nalgene bottles really bad for us?

I keep hearing about how Nalgene bottles leach dangerous chemicals into our water, and how Sigg aluminum bottles are a better alternative, but I'm not sure I'm buying it. The original source of the nalgene scare seems to be from this article in the Sierra Club's newsletter. The polycarbonate plastic used in Nalgene bottles (marketed as Lexan) contains bisphenol-a, which may be an endocrine disrupter. The Sierra Club cited a study that found that mouse cages made of a polycarbonate plastic similar to Lexan leached appreciable amounts of bisphenol-a when a lab tech accidentally washed the cages with a harsh detergent. Female mice in those cages later developed chromosone abnormalities in their eggs. Some sources have critiqued the link between the research the Sierra Club cites and the conclusion that the food grade plastic used in Nalgene's lexan bottles will leach during normal use, but much of the criticism has come from fairly biased sources, including this article from an outdoor industry trade magazine.

Instead the best evidence for nalgene bottles being safe is from the EU (see p 3 of this study). While the Sierra Club article cited only one study, the EU did a review of lexan-type plastics and found no or very little leaching of bisphenol-A from food grade bottles under extraordinary conditions (using more 95% ethanol and shaking it for 24 hours at a time), and no leaching at all when water or a liquid with an acidity resembling juice were stored in the bottles. The EU study cites over a hundred sources, including dozens of studies, but was published before the study cited in the Sierra Club article, and so does not directly address it.

So what to do? I won't be cleaning my Nalgene bottles with industrial grade floor cleaner anytime soon (this was what was accidentally used on the mice cages), and I've stopped using hot liquids in them. I also wouldn't wash them in a dishwasher or store liquids for long periods in them, but other than that I'll continue to use my Nalgenes.