the orange one is pretty good. but the nurses did say that the lemon lime one is the best. also if they are not cold they are really gross. but its just a little bottle and you drink it really fast.
get lemon lime. I've done the test 5 times and that's the only good flavor. the red one is so gross I threw up instantly. but the test itself isn't bad. bring water for after or during if they allow it because that much sugar may give you a fat headache.