I just get up and go for a p~@s! Last year at the bushmoot a mate of mine was sleeping in his hennesy and he takes a nalgene bottle to bed just in case, well he needed to go, so he did in his bottle, then before screwing the lid on he fell back to sleep, tipping the contents over himself! so I think I will just get up and go!
thats a sound reason not to try it! i could see that happening to me after a few beers
pete