Colas are a type of soft drink that are typically dark in color and sweetened with sugar or artificial sweeteners. They are carbonated beverages, meaning they contain dissolved carbon dioxide gas, which gives them their fizzy texture. Common brands include Coca-Cola and Pepsi, which are popular worldwide. The main ingredients in colas usually include carbonated water, high fructose corn syrup or sugar, caramel color, phosphoric acid, caffeine, and natural flavors. Colas are often enjoyed on their own or used as mixers in cocktails. They are widely available in cans, bottles, and fountain dispensers.