As seen on halloweenforum.com
I used a scrap piece if cement board for a base. I purchased a cheap strand of mini orange lights from big lots. Cut up some old water and cold drink bottles ( most came out of my teenage daughters bedroom ewwww) and a can of great stuff.
I used hot glue to attach the coke bottles as I arranged the lights. Make sure you have enough cord left out to plug in. Spray great stuff foam thinly to allow for expansion. When dry, in a few hours, apply a thin layer of black spray paint.
All my step my steps photos I accidentally erased but here is my finished project.