http://www.potsaa.com/white-milk/

Is this really the milk chocolate milk quality in white?
I heard that milk chocolate is made from acutally abandoned, runoff or discharge of white milk from milk factories. Is this true?
I made a tour of a dairy Knudsen's farm in Wisconson and they had huge vats of milk that had stasrted turning sour, which had been left on and then processed Chocolate milk.So they told us
Dairy Farmers Lite White – 24 hr Milk