Coca Cola is the most popular and biggest-selling soft drink in history, as well as the best-known brand in the world. Quench your thirst with this amazing drink. Best when shared with loved ones! What is in a Coke drink? Carbonated water – Approximately 90% of this drink is water. The carbonated part is purified carbon dioxide, which gives the drink its “bubbles” or “fizz”. Sugar – Coca-Cola Classic’s sweet taste (and also some of its mouthfeel) comes from sugar.