I sighted a $3 glass container containing VOSS boutique water. I wondered if I could cut the top off, so I could store stuff and see what's near the bottom. I took a moderate cut using the above mounted grinding disc with a success worth writing about.Another thought: I'm not so sure about mounting that 6-inch grinding disc on a bench grinder. While lots of imaginative cuts can be made into a variety of materials (including Kevlar), it can also throw medium-sized chunks back at your face.
Most of the chips were small, but just three "turns" made this into a decent first try. This will need a finer sandpaper (than 24 grit) to smooth the edges, but I'm happy with the result.