Well, my best friend got married and I wanted to give her, besides the other gifts I bought, something I made myself. Something special. So I found different gift ideas on the internet and when I saw simliar mugs like that I thought that was the perfect gift for her (she and her now husband love coffee).
So doing this was just as easy as doing the better than Gandalf-mug I talked about before on my blog. All you need are two coffee cups and a red and black ceramic marker.