they are in their while u piss, but they cant take away ur rite to privacy so i request a stall an leave the door open so not to make them think anything, and if ur good enough than u can pour the piss in the cup an make it look like ur takin a piss, ive heard sum ppl put it in a condomn so its not as bulky lol, an no piss does not get old unless u put it in a bottle an seal it shut, and no they have no way tellin thats its not urs trust me........peace