I am generally of a nervous disposition and usually have to get up several times in the night to pee. I'd really prefer to avoid having to get up and out the tent, because with all the rigmarole, I'd probably end up not getting back to sleep. Is there some kind of bottle or some way to pee inside the tent (I'm a man...). I know old folks in hospital can get something so they don't have to get up all the time.