I was wondering about QF 4.0, the bottle I just got says that it is unisex...now, I know there is obviously a difference between male and female urine, so how could unisex work for both without anyone knowing? Sorry, Im just a little paranoid...Also, the hand warmer that comes with the bottle says that it will heat it up to 98-100 degress within an hour, and will last for six hours...is this temperature accurate enough to count on? If so, I plan on rubber-banding the warmer to the bottle, sticking it in my boot and pouring into the cup after my physical...Thanks for helping a fellow smoker guys!:pimp: