Glass Bottle Cutter

[Mazay]

Homemade Glass Bottle Cutter - Cut any Diameter or Length glass bottles

[Frank S]

Your device is probably a much better way than I did it as a kid.
I used to wrap a coper wire around a bottle then connect it to a 12volt lantern battery the wire heated up the bottle snapped in two. Sometimes nice and clean but sometimes the cut would be uneven due to the wire not being straight