<P> The new product continued to be sold and retained the name Coca - Cola (until 1992, when it was renamed Coke II), so the original formula was renamed Coca - Cola Classic (also called Coke Classic), and for a short period it was referred to by the public as Old Coke . Some who tasted the reintroduced formula were not convinced that the first batches really were the same formula that had supposedly been retired that spring . This was true for a few regions, because Coca - Cola Classic differed from the original formula in that all bottlers who hadn't already done so were using high fructose corn syrup instead of cane sugar to sweeten the drink, though most had by this time . </P> <P> "There is a twist to this story which will please every humanist and will probably keep Harvard professors puzzled for years," said Keough at a press conference . "The simple fact is that all the time and money and skill poured into consumer research on the new Coca - Cola could not measure or reveal the deep and abiding emotional attachment to original Coca - Cola felt by so many people ." </P> <P> The company gave Gay Mullins, founder of the organization Old Cola Drinkers of America (which had lobbied Coca - Cola to either reintroduce the old formula or sell it to someone else), the first case of Coca - Cola Classic . </P> <P> By the end of the year, Coca - Cola Classic was substantially outselling both New Coke and Pepsi . Six months after the rollout, Coke's sales had increased at more than twice the rate of Pepsi's . </P>

What happened through the new coke marketing campaign