Diet Coke
Diet Coke does not use a modified form of the Coca-Cola recipe, but instead an entirely different formula. The controversial New Coke, introduced in 1985, used a version of the Diet Coke recipe that contained high fructose corn syrup and had a slightly different balance of ingredients. In 2004, Coca-Cola introduced Coca-Cola C2, which it claims tastes much closer to Coca-Cola but contains half the carbohydrates. In 2005, the company introduced Coca-Cola Zero (replaced by "Coca-Cola Zero Sugar" in 2017), a sugar-free variation of regular Coca-Cola.
Pepsi-Cola Made with Real Sugar
In early 2009, PepsiCo announced plans to release versions of Pepsi and Mountain Dew with pure cane sugar as its main sweetener, and without the citric acid found in regular Pepsi, on a limited basis. The original shipment went on sale in April 2009, and ended in June. Sales were strong for both, prompting PepsiCo to release a second limited edition for December 2009–February 2010.