Diet Coke

Diet Coke (also known as Coca-Cola Light or Diet Coca-Cola) is a sugar free, low calorie version of Coca-Cola. It was first introduced as Diet Coca-Cola in July 1982. It is marketed as having zero calories because Food and Drug Administration (FDA), guidelines allow drinks with less than five calories to be marketed as having no calories. It is popular among some diabetics, since they cannot drink regular Coca-Cola because their system cannot tolerate sugar.
Diet Coke is sweetened with aspartame, and has a completely different recipe from the Coca-Cola.