Coca-Cola Zero Sugar, also known as Coca-Cola No Sugar, commonly known as Coke Zero, is a diet soda produced by the Coca-Cola Company. The drink was introduced in 2005 as Coca-Cola Zero, designed to be a no-calorie equivalent of the company's flagship cola drink, Coca-Cola, with artificial sweeteners in place to imitate the sugar taste. It is distinct from the company's earlier Diet Coke product which was based on an entirely different formula. In 2016–2017, the drink was reformulated and the name changed to Coca-Cola Zero Sugar, and the drink was reformulated again in 2021.