They do piss test, they dip a stick in it and pop up several colors, they match it with the bottle. I dont know what they was looking for. But it was several things like blood sugar, protien , other wierd stuff never heard of. I don't think a little would hurt , but you don't wanna go there hung over. Ekg, eye,audio, wouldn't hurt. But drinking may raise blood pressure. Best to avoid it. Youll need the energy, its going to be a long day