What is a 2 can?

Some think a # 2 can is what you take with you on a long road trip in case you need to make frequent stops. Not so. Years ago there were different types of descriptions of measurement used in recipes. Many recipes would call for a # 2 can. Unless you were alive way back then you would not have a clue as to how much this would be. By today’s standards a # 2 can would be equivalent to 20 oz. or 2 1/2 cups.