Have you thought about using hydrofluoric acid instead?

On May 3, 2:11 pm, "Bob" wrote:
I have a few empty Crown Royal bottles out of which I want to make small
lamps. Most are the 750ml size & a couple 1.75 liter size. The bottles are
attractive and I think they could make nice lamps for background or accent
light in an office or den.

My problem is that I don't know how to make a hole in the back side of the
bottle near the bottom in which to thread zip cord.

I've tried new drill bits running the drill press as slowly as possible,
using various lubes (oil, alcohol, and carb cleaner), but can't get a hole
started in the glass. I even tried a masonry bit - didn't work either.

Any ideas? Thanks, Bob-tx