What creative uses are there for about 100 glass bottles?

I have about 100 blue glass bottles (10 fl oz); besides recycling them, what could I do with them? Is there anything that I could build with them (without having to buy too many materials)? Also, if I were to build something with them, what kind of glue would I use to stick them together or to something else? I’m looking for something to do that’s cheap, creative, and easy. The more options the better!