I am interested in the size of the U.S. market for flavored, fortified
bottled water targeted to kids.  The water will have vitamins,
fluoride, and slight artificial flavoring, but no sugar.  It will be
packaged and marketed specifically for kids.

With childhood obesity on the rise, more healthful options for
children need to be developed and I am trying to estimate the size of
the potential market for these.  To do this, I want to first
understand what quantities (number of servings, etc.) of various
beverage categories kids of different ages are drinking today

The ultimate answer to my question would be a matrix of kids
consumption with category of beverage (such as carbonated soft drinks,
non-carbonated sweetened drinks, diet soft drinks, energy drinks, milk
products, juices, water, other beverages etc.) on the vertical axis
and age ranges on the horizontal axis (3 and under, 4-8, 9-12, 13-15,
16-18, etc.).  In each cell of the matrix would be the average number
of servings consumed per day or whatever time period is available.

To support this, I would also like to know the approximate size of the
U.S. population of kids in various age ranges below 18 years.