The New York Times has a great/terrifying article called The Extraordinary Science of Addictive Junk Food. You should check it out, however, my favorite beverage's origin story is revealed:
The soda that emerged from all of Moskowitz’s variations became known as Cherry Vanilla Dr Pepper, and it proved successful beyond anything Cadbury imagined. In 2008, Cadbury split off its soft-drinks business, which included Snapple and 7-Up. The Dr Pepper Snapple Group has since been valued in excess of $11 billion.