Nearly 19 years ago, I gave up soda (a very caffeinated one) cold turkey. It was tearing a hole in my stomach and caused great pain after five years of collegiate life and burning the candle at both ends for a couple years post-university. There are many reasons not to drink it - the sugar or sweeteners added, the caffeine in some, and the pure addiction of empty calories.
Fitness Republic has spoken on this topic very well. If you're trying to leave this beverage during your weight loss journey, here are some reasons that could help you quit. Good luck!