Empty a juicebox( it's better If the juice is a darker color) into a glass/cup and when the glass is filled pour 6 drips of tobasco sauce into the glass,when your all done call the victim over and say, "I thought this was (something different then what it was) and when I took a sip it tasted awful because I hate( whatever it is) and nobody else wants it":) it'll really Get them and it's funny!!!!! I have done it