Difference between cola and food in Korean
콜라·음식

콜라cola
콜라 means cola, a common black-colored soft drink with bubbles. People use this word when ordering a drink, buying one at a store, or talking about what they like to drink. It is a very common food and drink word in daily life.

음식food
Food means things that people eat. In Korean, 음식 means meals, dishes, or food in general. You can use this word when talking about cooking, restaurants, shopping, or what you like to eat.
The difference
음식 means food in general. 콜라 is a specific drink, not a general word for things to eat and drink.