You can cut glass bottles at home using materials you probably already have on hand.
Materials:
glass bottles
yarn
nail polish remover
lighter
sink full of ice water
sandpaper
Directions:
1. Wrap the cotton yarn around your bottle 5-6 times, tie and cut ends. You can also braid three pieces together and tie that around the bottle. I actually had better results using the braided yarn.
2. Slide yarn off of the bottle.
3. Dip yarn in nail polish remover. I filled a bowl with nail
polish remover and let the yarn sit in it for a few seconds to make sure
it was fully saturated.
4. Slide the wet yarn back onto the bottle. NOTE: The bottle will
be cut wherever you place the yarn, so make sure it is as straight as
possible.
5. Holding the bottle sideways from the mouth, light the yarn on
fire. ****Please please be careful!**** Only the wet yarn will be lit
on fire and the flame is very well controlled.
6. Rotate the bottle in circles as the yarn is on fire for 20-30 seconds so that all parts of the bottle warm evenly.
7. Holding each end of the bottle, submerge in cold water and watch the bottle parts separate.
8. Use sand paper to smooth rough edges.
You can make more than just drinking glasses. Think vases and candle holders too! This method is supposed to work on wine bottles too, though I haven’t tried those yet.