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.
Coca-Cola
During the 1980s, Pepsi-Cola ran a series of television advertisements showing people participating in taste tests demonstrating that, according to the commercials, "fifty percent of the participants who said they preferred Coke "actually" chose the Pepsi." Statisticians pointed out the problematic nature of a 50/50 result: most likely, the taste tests showed that in blind tests, most people cannot tell the difference between Pepsi and Coke. Coca-Cola ran ads to combat Pepsi's ads in an incident sometimes referred to as the "cola wars"; one of Coke's ads compared the so-called Pepsi challenge to two chimpanzees deciding which tennis ball was furrier. Thereafter, Coca-Cola regained its leadership in the market.