The Center for Science in the Public Interest (CSPI) stated in their article "Healthy School Snacks," published on their website (accessed Mar. 12, 2007):

“Single-serve containers of chocolate or other flavored whole or 2% milk drinks can be too high in calories (400-550 calories) and saturated fat (1/3 of a day’s worth) to be a healthy beverage for kids.”

Mar. 12, 2007