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
By 1985, Coca-Cola had been losing market share to diet soft drinks and non-cola beverages for many years. Consumers who were purchasing regular colas seemed to prefer the sweeter taste of rival Pepsi-Cola, as Coca-Cola learned in conducting blind taste tests. However, the American public's reaction to the change was negative, even hostile, and the "New Coke" was considered a major failure. The company reintroduced Coke's original formula within three months of New Coke's debut, rebranded as "Coca-Cola Classic", and this resulted in a significant gain in sales. This led to speculation by some that the introduction of the New Coke formula was just a marketing ploy to stimulate sales of original Coca-Cola; however, the company has maintained that it was a genuine attempt to replace the original product.