UPI:

The American Beverage Association is supporting proposed U.S. Farm Bill legislation that would curb the sale of soft drinks in schools.
The proposed legislation would limit the sale of sports drinks to athletic areas in high schools. Only bottled water, milk, juice or other drinks containing no more than 25 calories for every eight ounces would be allowed, the Wall Street Journal said Friday.

Interesting perspective, that perhaps speaks to their market power.