That mug is the BEST! (How did you even DO that? O.o )
I love to do graphic design work and I created the drawing on my computer. I then printed the image onto Lazertran paper. This paper is the processed with heat and water (etc) and can used to transfer images onto canvas, textiles, but my favorite, ceramics/glass.
I have been meaning to do a tutorial after getting many compliments over some Alice In Wonderland plates that I did. Guess I will have to make time for it.