If you happen to use the practical and fashionable water bottles by SIGG, you will want to read their statement about BPA content by clicking here. If you have a SIGG bottle manufactured prior to August 2008, you can send an email request to the company for a replacement liner. If you're not sure when your bottle was manufactured, look at the photos here to figure it out.
The bottles really are pretty great to use, so I'm glad they've worked it out (they do claim that even the older bottles were completely safe, but I'm one to be ultra conservative with this sort of thing, so I don't plan to test the theory on my own family).
It does make you wonder what kind of gunk is in pretty much everything we use. For our part, we're trying to eradicate as much plastic as possible from our lives - especially any plastic that touches our food. That isn't easy to do, particularly when it comes to food storage. We also try not to let aluminum foil come into contact with our food. These things aren't easy, but we're doing our best.