concentrated day-glo dye
I 'brew' mine from the wick from many colors of highlighters-
even one that no longer highlites can be used- there is a guy selling 1 oz. bottles of his dye for WAY too much-- his listing shows the colors he offers in several kinds of booze bottles and he EVEN tries to sell you an empty bottle- AND a few fools have purchsed what can be gotten at any bar for free--lol
If you are lazy and have $$ to spare I can ship your four diff. colors -Green- yellow orange and pink-
concentrated to the point where only a few drops will make your bottle light up with 405 445 or 532 lasers especially 405--PM for the details..