There are a lot of crafts that you can do with used bottles. Unfortunately, I was short on time and resources so I went with the most simple one: wine bottle boot shapers.
I don't use boot shapers generally so this one sounded interesting. It does work pretty well and could be a great way for me to organize a closet. My only advice is to make sure that bottle is really clean before you leave it sitting in your boot for days, weeks or even months.
Another one to try: This wine bottle bird feeder is a cute idea but I gotta say it looks a little unsteady.