Diet Coke
Diet Coke (called Coca-Cola Light in some countries) is a sugar-free and no-calorie soft drink produced and distributed by The Coca-Cola Company. It contains artificial sweeteners instead of sugar. Unveiled on July 8, 1982 and introduced in the United States on August 9, it was the first new brand since 1886 to use the Coca-Cola trademark. The product quickly overtook the company's existing diet cola, Tab, in sales.
New Coke
Coca-Cola's senior executives commissioned a secret project headed by marketing vice president Sergio Zyman and Coca-Cola USA president Brian Dyson to create a new flavor for Coke. The effort, Project Kansas, took its name from a photo of Kansas journalist William Allen White drinking a Coke; the image had been used extensively in Coca-Cola advertising and hung on several executives' walls.