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.
Monster Beverage
Their "Diet Soda" is available in ten flavors: Cola, Black Cherry, Peach, Kiwi Strawberry, Vanilla Cherry Créme,Tangerine Lime, Ginger Ale, Root Beer, Grapefruit, and Pomegranate. Hansen's diet soda is sweetened with acesulfame potassium and sucralose. All diet sodas are OU Kosher certified.