2. The Continuing Decline of CSDs and Ongoing Consumer Distrust of Big Soda Companies: Coke’s Global Energy Balance Network was just one black eye for big soda. Despite changes in sweeteners, Diet Pepsi and Diet Coke continued to underperform, with share moving to energy drinks, sparkling water, and non-carbonated products. Yes, package innovation kept some users on board, but it’s getting harder to call the bottom.