I'm a regular visitor, with a very full bladder, been a busy morning and haven't pissed since breakfast. I was hangover thirsty this morning and drank three pints of water before i left the house.
Urinals - go drink three pints of water and hold your bladder until you are totally full, bursting to pee and ready for the flush. Pee into a the largest bowl you can find and drink it all up whilst it is nice and warm. mmm yummy eh?!
Remeber you must not spill or leave a single drop.