Thanks for the info everyone. I'll stop worrying about possible BPA, but I'd still like to avoid the plasticky taste that develops when my waters been sitting in the bottle in the hot sun over a few hours on a ride, so I'm going to continue to search for something that doesn't do that like my team water bottles are. I got a Klean Kanteen but the steel-on-steel noise is no fun so I'm going to see about wrapping it in cloth tape or stickers. One nice thing about it though is that it being slightly longer than the average plastic bottle makes it extremely easy to take out / put back in the bottle cage. Those Soma Polypropylene water bottles could work...