Sources: The Journal of Pediatrics [abstract], Elsevier/Columbia Univ. [press release]
quote: A 2-liter of soda is cheaper than a gallon of milk or bottle of juice. And your kids are always much more happy drinking the soda than either. While giving the soda to your kids to pacify them can be construed as bad parenting, when money is tight and every penny counts soda can be an appealing option. Especially in areas that have bad or harmful tap water.