Here are the instructions as I found them from a friend on Facebook.
With a little further investigating I came across these instructions for a similar technique:
There are so many great ideas with re-purposed bottles that I would love to try. I think this could be the perfect price-friendly solution to a large number of wedding decorations. It would just require planning ahead and having people save glass bottles for you! After I try this out, I will have to do a post to reveal the answer, Cut Glass Bottles- Fact or Fiction? Have you tried it? Let us know!