All you need is

1 cup, Water and your Victims Favorite Drink, Obvioiusly the water you will need to make ice, about an inch to be exact, Once the bottom is frozen cut out the base of the cup, the ice should stay in tact for a few minutes, at this time you will pour your victims favorite drink into the cup.... Lastly you play the waiting game and eventually the ice will melt and everything will spill.

Watch the instructional video!