we do the real coke thing - primarily because neither one of us really likes the taste of the diet ones (but then, i won't even drink pepsi!) - i would prefer water most of the tie - usually have coke at night with dinner - but only after i've had at least 2 L of water during the day - and half the time hubby finishes my can (i don't leave them around Abs - i have a hubby to finish them for me!!)