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
Finally, the Coca-Cola board decided that enough was enough, and plans were set in motion to bring back the old Coke. Company president Donald Keough revealed years later, in the documentary "The People vs. Coke" (2002), that they realized this was the only right thing to do when they visited a small restaurant in Monaco and the owner of the restaurant proudly said they had "the real thing, it's a real Coke," offering them a chilled 6 and 1/2 oz. glass bottle of original Coca-Cola.