Nalgene and Camelbak both just announced that they are discontinuing PC bottles and also launched new BPA-free bottles. Polar Bear Bottles are also a good, very lightweight option and are insulated (but still plastic). I really liked the Polar Bear Bottles but my husband seemed to like either the Nalgene or the Camelbak ones. Just make sure that if you get them on-line, they are clearly marked as BPA-free. (The Nalgene ones will have a large sticker on them that indicates they are BPA-free and the Camelbak ones have BPA-free written on the bottle itself.)
We'll be reviewing a bunch of adult BPA-free bottles on my blog this week. If you PM me I can send you the link.