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It became the first diet cola to be distributed on a national scale in the United States. Diet Pepsi competed primarily with another diet cola named Tab in the 1960s and 1970s; however, The Coca-Cola Company introduced Diet Coke in 1982 and this product has since been the principal competing product to Diet Pepsi.
As of 2010, Diet Pepsi represented a 5.3 percent share of all carbonated soft drink sales in the United States, and was ranked as the #7 soft drink brand by volume.
In the same year, Diet Coke was recorded as having a 9.9 percent market share.
A caffeine-free version of Diet Pepsi is also produced.
The availability and brand identification of Diet Pepsi flavor variants varies by country.
In addition to Diet Pepsi, Pepsi Co produces other low-calorie colas known as Pepsi Max and Pepsi ONE.
Diet Pepsi is a no-calorie carbonated cola soft drink produced by Pepsi Co, introduced in 1964 as a variant of Pepsi-Cola with no sugar.
First test marketed in 1963 under the name Patio Diet Cola, it was re-branded as Diet Pepsi the following year, becoming the first diet cola to be distributed on a national scale in the United States.