This is the ONLY glass cutting method that cuts bottles perfect every time. A flaming string is not good. A blow torch is a BAD IDEA. Glass hammer will not work well.
http://www.greenpowerscience.com/
I talked to a few people who have cut 1000’s of bottles, they say “you cannot get a perfect cut, top will always be ruined” Not true. Perfect bottle cutting 95% of the time.
Glass Bottle Recycling. Reduce Reuse Recycle.
Make glasses from bottles.
Glass Bottleneck Guitar Slides.
DIY Bottleneck, Slide & Lap-Style guitarist.
Duration : 0:10:12