A stopwatch
A Regulation Sized Frisbee (175 gram variety)
2 straws
3 pints of beer
This game is predicated on the fact that a regulation sized frisbee is capable of holding nearly 3 pints of fluid.
So a judge type person fills the frisbee with beer. Two people then drink the beer from the frisbee at the same time using straws. All three pints must be drunk.
The pair that drinks the beer the fastest wins.
Pretty simple, right. Just be sure to get a bunch of straws (ie stop by a fast food restaurant).