The Pee Goal includes a nice pitch, a goal, and a ball on a string. You use your penis to push the ball into the goal, apparently.
Oh wait. Just re-read it. You use your URINE STREAM to push the ball into the goal. It's about $20 in England, and I suspect you can take this around with you, drop it into a urinal, play a game or two, and then pack it up again. Quite a bit of fun, right?
Product Page [LazyBone via GadgetSpy]