Whether or not an overnight Coke is drinkable depends on the method of preservation. Overnight cola should not be drunk at high temperatures, but can be drunk in the refrigerator. If you keep an opened Coke outdoors in the hot summer, the gas in the Coke will evaporate overnight, making the taste worse. And it is easy to lead to a large number of bacteria breeding, this situation is generally not recommended to drink again. If you don’t finish the coke, tighten the cap and place it in the refrigerator to save, you can generally continue to drink. But do not often drink overnight in the refrigerator, because some people’s gastrointestinal function is not very good, there may be gastrointestinal symptoms. Although you can drink overnight cola in some cases, you should not drink it regularly. Coke is a carbonated beverage, containing caffeine and more sugar, long-term consumption is not good for the body, for their own health is recommended to drink less cola.