 Early on, to save money, this was also originally in a blend with saccharin.After Diet Rite cola advertised its 100 percent use of aspartame, and the manufacturer of NutraSweet (then G. D. Searle & Company) warned that the NutraSweet trademark would not be made available to a blend of sweeteners, Coca-Cola switched the formula to 100 percent aspartame.Diet Coke from fountain dispensers still contains some saccharin to extend shelf life.