Here is something fun for all the video game fans out there,bound to put a smile on your face first thing in the morning when you are having your morning coffee, the Heat Changing Arcade Mugs.

There are two different versions available, Pac Boy and Space Intruders, and when you add some hot liquid to the cups their appearance changes, check out the video of the in action below.

Normally the Pac Boy mug displays an empty maze and the Space Intruders mug displays a blank starry sky. But add some kind of hot beverage and instantly the Pac Boy maze is filled with 8-bit style ghosts and energizers while the Space Intruders shows a retro invaders style battle in action.

If you want one of these fun Heat Changing Arcade Mugs they are available for $7.99 each from Think Geek.