You will use the Empty Bowl to have a bowl of milk from the waitress that is carrying a milk on the Carrot Kings Dinner, since they don’t have bowl available there. This is the first item that you should get in 24 Carrot Island.
How to Get the Empty Bowl
On the Carrot Farm area, enter to the house using the chimney and walk left you will find an empty bowl. Get it and go back to the main area to get the full bowl of milk.