glass bottle cutter

just a simple rig to hold the bottle, to make sure the cut is on one line, for making whiskey glasses. I set the cutting height to 100mm, but I included all files so you can simply adjust it.
Pour cooking water over the bottle and then cold water, repeat if necessary. Will break without force.
Note: use water / wet sandpaper when grinding, the glass dust will get in your lungs else, and you don't want that.