I showed an easy glass cutting technique here. And I thought I'd show my progress after a bit of practice. First I came to the realization I wasn't sure what to do with the tops- so I made them into a wind chime!
Just a bit of string and wire I bent to make this project!
I also have gotten better at the straight edges, and used wet/dry sandpaper to polish off the edges. Although they appear smooth enough for drinking glasses (which was my goal) I'm still looking into more projects I could do with the empty glasses!