Soda is one of most wasted calories you can have. Americans get far too many calories as it is, but drinking soda only adds unnecessary calories that you don't need.
Think about it, why have a 300 calorie soda when you can have a flavored water and save yourself some calories. Of couse diet soda is better than regular, but still soda is not good for you. Research shows that diet soda drinkers waistline grew 70 percent more than non soda drinkers. If you're trying to lose weight, why risk it by drinking soda?