we all know chocolate milk is the best drink ever but...my buddies and i carefully take apart the top of keg (where the tap screws in) and refill it with lots and lots of vodka, some water, whatever fruit juice mix you want, and a few bottles of sprite to build up pressure. put it back together, put the tap on. once you get the right concoction, bam you have tasty flowing keg that is sure to black everyone out.