I drink one diet coke per day and water the rest (sometimes I may throw a glass of generic crystal light in there too). As long as you're getting 8-10 glasses of water in ADDITION to your diet coke, you should be good. I would try to cut it down to one can (maybe two on occasion) though because you don't want to end up stalling your weight loss and like someone said before, that stuff is expensive!! Another suggestion, if you like it, try mixing your diet coke w/ Diet Rite (not literally mixing together, just alternate). The strawberry kiwi and red raspberry are very good! They're made w/ Splenda, so you don't have to worry about aspartamine.

How many cans/bottles per day are you drinking anyway?? If it's 4+ you may want to start gradually decreasing the amount you drink until you get it down to one...

Anyway, just a suggestion - you're free to do whatever you need to.