4oz. of fluorescent liquid and an ultraviolet light.Do you want to know why this glowing liquid is so special? Well, that’s because it’s so strong and can be mixed with all kinds of things. With only a few drops of this highly concentrated fluorescent dye, you will change two liters of water-based liquids into a neon green potion! You will get just 4oz (120ml), but that’s enough to make 23L of glowing potions, solutions, and more! Your newly dyed atomic liquid just needs a dark room and a backlight to transform into a glowing green liquid that will radiate for months.