cool dude, i made a 3 chamber piece out of the mini voss bottles just recently http://forum.grasscity.com/toking-tools/344160-new-homeade-add-collection.html
yo do u need a special drill to make the hole without cracking the glass and is there any other way than a drill?
If you guys are looking to drill glass, here's what I've done. I got a dremel and then a few different shaped grinding bits. I basically grind a hole in the glass. It takes a little time (5-10) minutes and be sure to have a seringe or eye dropper of water and to drip some on the spot you are grinding very often. It keeps the glass cool and the grinding is much more smooth. Sometimes the glass cracks, but it's never broken. Works best with a thicker glass.
I've said it once and I'll say it again the only 2 bottles I would ever use for a bong is a Goldschlager one or a OE 40 oz bottle