In this Feb. 9, 2009 file photo, Pepsi drinks are on display at JJ&F Market in Palo Alto, Calif. PepsiCo says it’s dropping aspartame from Diet Pepsi in response to customer feedback and replacing it with sucralose, another artificial sweetener commonly known as Splenda. The decision to swap sweeteners comes as Americans keep turning away from popular diet sodas. Coca-Cola said this week of April 20, 2015, that sales volume for Diet Coke fell 5 percent in North America in the first three months of the year.(AP Photo/Paul Sakuma)