When you follow a recipe at home and you do not have a meter for liquids, you can use the plastic cup as a measurement in recipes.
The plastic cup standard, the classic white that you put on the table for water is 200 cc.
In terms of liquid, the container contains 200 ml of liquid.
Just follow the recipe and make the proportions.
If, for example, the recipe calls for 100 ml of milk, filled half the glass.
There are also other measures such as cups of 166 cc, 300 cc, 30 cc.
Just remember that cc = ml