Aggregating definition, formed by the conjunction or collection of particulars into a whole mass or sum; total; combined: the aggregate amount of indebtedness. See more. Dictionary.com
Originally called Brad's Drink, the beverage was first marketed as a digestive aid and energy booster. It was renamed Pepsi-Cola because of its pepsin and kola nut content.
The change applies to all versions of Diet Pepsi, such as Caffeine Free Diet Pepsi and Wild Cherry Diet Pepsi sold in the U.S. Diet Pepsi was introduced in 1964, with saccharin as its sweetener. It was reformulated with aspartame in 1983, and then switched to a blend of aspartame and ace-K in 2013.