Glass usually breaks when you apply pressure from a drill, but this can be remedied with proper lubrication, gentle pressure and patience. When it comes to drilling a hole in glass, having the right tools and process also helps.
Inexpensive craft store frames fit perfectly around light switch covers! --I like the LOOK Expensive (but not really BE expensive! -- 31 Easy DIY Upgrades That Will Make Your Home Look More Expensive--
Make Unique Decorative Tiki Torches Out of Glass Wine/Beer/Soda/Olive Oil Bottles-Special Wick Holder! - TeeDiddlyDee I'm thinking nix the beer bottles and Morgan & I can supply NUMEROUS wine bottles for this cool project