I love the idea of using old bottles this way
Pat and think your example is a very attractive one
scotkat - as this is something that I've actually done myself and really enjoyed doing - I can honestly say that it is actually very easy and safe to do - once you've obtained a glass cutter and mastered the art of using one.
For anyone wishing to start creating their own glass bottle ideas - there are plenty of glass cutting machines available to buy online which vary from the very sophisticated to extremely simple - like this one
which I have used myself and found it to be real easy and not very expensive either
There are so many things that you can make once you have a glass cutter - from candle holders, to outdoor lanterns and even mosaics and if you are feeling slightly creative - have a look at some of the wonderfully amazing things that you can do with all your empty bottles here
https://www.gardening-forums.com/threads/glass-bottle-garden-ideas.1897/