Decorating outdoors with colored bottles has always appealed to me. Then tonight they had a blurb on a show about bottle trees. Imagine a dead tree with all it's branches cut short, and then a colorful bottle is inverted over each branch. Viola, bottle tree! And there is a metaphysical meaning to them. It was said that the bottles attracted evil spirits over night, and then in the light of day the spirits would be destroyed.
I don't have much of a yard but I'd sure like to make space for a bottle tree. You can use old artifical Christmas trees as a base too. Or even a fence post with pegs in it would work.
The bottle trees with blue glass are particularly striking to me. If I ever get one built I'll let you know.