vintage gothic halloween potion bottles (set of 2 glass bottles) halloween decoration fun express make it look like you're brewing up some magical, mystical, spooky potions with these vintage halloween mercury potion bottles. a great addition to halloween decorations, these bottles have a classically spooky look, and everyone who sees them on your entryway table will be delighted with your halloween décor. glass. (2 pcs. per set) large, 12 1/2" x 3 1/4" diam.; small, 8 1/2" x 3 1/4" diam. includes stoppers.