This is a very interesting read on how beverage companies have not decreased marketing exposure to youth for sugary drinks (and in fact, it nearly doubled from 2008 - 2010). Overall, it says, "sugary drinks are the top source of calories of calories in teens' diets."
Additionally, remember that many fruit drinks (which are often viewed as being a healthier choice) can contain just as much sugar and calories as a soda.
Check this article out for alternatives to soda and sugar-filled fruit drinks for your children:
Beverage Companies Market Unhealthy, Sugary Drinks to Children and Teens
