A while back, I’d say late last year, everyone was talking about how bottles that had BPA were no longer accepted when it came to water bottles.  At the time Nalgene had to take a hit over that, as most all of their bottles contained what nobody wanted.  From there, Sigg was selling out and you most of their bottles were not available.  But that is not the case now.  Sigg has a decent selection out now, and even though they start around $18, I think it’s well worth it if you are going to be traveling and dislike trashing plastic every day.