The story of the bottle tree is that African slaves from the Congo brought the idea for the bottle tree to the United States. The bottles trap evil spirits in them and keep them from entering your home. We have this bottle tree out by our fire pit hosting the "evil spirits". This was another of my ideas for DH to do. He used a dead red cedar tree; drilled holes in it; placed cut pieces of re-bar in those for the bottles to rest on. Many friends and my kids have added pretty bottles to the tree. A fun source of conversation when people are visiting the yard.