Difference between cola and meal in Korean
콜라·식사

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.

식사meal
식사 means a meal, or the act of eating a meal. It is a polite, common word you can use for breakfast, lunch, or dinner. You will often hear it in daily conversation, for example when asking if someone has eaten.
The difference
식사 means a meal, like breakfast or dinner. 콜라 is one drink you can have with a meal.