Ok, this comes close to the more traditional ones here:
found near #fulda 
Discussion
That's pretty cool actually. Great keg repurpose
Question is do you pee or crap in it? Probably both
If you had to much beer take the left one: You can vomit in.
If you had not to much beer take the right one to pee in.
Short explanation: the right one was in it’s former life a metal beer barrel, now cropped or partly circumcised.
😉