Coke is made of sugar, carbonated water (carbon dioxide and water), caramel, phosphoric acid and other raw materials, and its shelf life is about 12 months. After opening the bottle, the shelf life will be shortened and the carbon dioxide gas will be reduced. Coke can be kept in the refrigerator for up to 3 days. At this time, coke has no taste of carbon dioxide drink, but is just a sweet drink.