Think Geek has these incredible Iron Man 3 Arc Reactor coasters. They come in a set of 4 so you and your friends can make your spirit of choice glow arc reactor blue. They have an on/off switch as well as a battery conserving auto off function that shuts them down after 5 minutes. They’ll set you back $30 + shipping. You’re on your own for finding a Jarvis to pour your drinks.