I had a large green stone laying around after having made a bunch of faux gemstones. So I decided to make a really creepy cool potion bottle for my Halloween display. Once I had done the bottle, I made a matching lid. I'm going to have to come up with a really dreadful sounding potion ingredient to put in the bottle.
After I made it, my kids thought it reminded them of the dark Spiderman from the third movie (or "Emo Spidey" as he has come to be known in our house.)