Here is a simple way to drill glass! I drilled a few bottles to make a lamp!
The tools:
Carbide tip drillbit: http://amzn.to/2CwPVm9
Diamond coated holesaws: http://amzn.to/2D0E29e

Want to support me on Patreon?: www.patreon.com/cactus_workshop

Follow Cactus! Workshop:
Youtube: http://bit.ly/Cactusworkshop
Instagram:   / cactus_workshop  
Facebook: https://www.facebook.com/Cactus-works...

Music:
More than you know + Justin (by Andrew Applepie)