The contenders:
Which one will keep your beer the coldest? You'll have to click to find out. While the scientific results alone are worth the click, the alternative material cozies created for further testing and their results are the real prize. Rice crispie treat, space blanket, sweatbands - which material will reign supreme?
UPDATED: I forgot to note originally that this link came to us via A Good Beer Blog (sorry Alan!).
