It wasn't dealt with much in the movies, but in the Iron Man comic books Tony Stark is constantly battling alcoholism. And that's what makes these light-up glowing coasters ironic. On the big screen, he used the technology he developed to fight crime and make the world a better place. But in the comics, he would have probably been more inclined to turn the arc reactor into drink coasters just like these.
Available exclusively from ThinkGeek in a set of four for $30, each aluminum coaster is powered by a pair of watch-sized CR2032 batteries. The embedded LEDs make any drink placed on the coasters glow a eery blue tint, and to maximize the life of those tiny batteries the LEDs automatically shut off after five minutes. The life of a superhero isn't easy, but who says it has to be dry? [ThinkGeek]