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
The sweeter cola overwhelmingly beat both regular Coke and Pepsi in taste tests, surveys, and focus groups. Asked if they would buy and drink the product if it "were" Coca-Cola, most testers said they would, although it would take some getting used to. About 10-12% of testers felt angry and alienated at the thought, and said they might stop drinking Coke altogether. Their presence in focus groups tended to negatively skew results as they exerted indirect peer pressure on other participants.