I was at the Hotter 'n Hell 2008 this past weekend and saw a booth for BottleSox. Apparently this is a "koozie" that covers the entire bottle that keeps it completely insulated and made from the same neoprene skin diving suits are made of, AND fits in most bike bottle cages. I almost got one but I wasn't riding due to a sprained ankle so I didn't indulge. Anyone out there ever heard of these and do they really work? I got a card and they are at www.nichelab.com if you want to take a look...anyone who has used one I would appreciate your opinion of them. The booth was making good sales but I would like anyone's opinion before I order any. Thanks!