I can never have enough mugs for coffee and I am digging the line of caffeine-holding goodies from ThinkGeek. Came across this heat-change mug for gamers. Just fill the mug with a hot liquid and the writing will change from “Game Over – Refill?” to “Ready – Player 1 Start!”
Holds up to 11oz, made out of ceramic, and is roughly 3.75″ Tall with a 3.25″ diameter. It goes for $11.99 + Shipping.