This was actually a belated Christmas present for my Uncle, I saw it on pinterest and knew that I HAD to make it for him. There are so many tutorials for these, so I won't bother going in depth with how I made it.
But the quick run down is, get a ceramic mug from any store, write a phrase or draw a picture on it with a sharpie then bake it at 350 degrees for thirty minutes. Let it fully cool in the oven, so it's a nice slow cool and doesn't crack.
It is washable, and dishwasher safe. Neat, right? I thought so.