Kiln-made Coasters

I mentioned a long while ago that I had taken stained glass lessons from the ladies down the street,. They also do something call glass melting where you can fire glass and then slump it into a mold of a bowl or whatever you want. Well, my father has had a pottery kiln in the shed for longer than I have been alive, so I wanted to attempt a glass melting experiment. I decided on coasters because I think they must be the easiest thing to make. Here is how they turned out:

Pretty darn good for a first try I think! Have you don't any glass work?