How do you get 4 oz with a 3 cup and 5 cup?

You can't get exactly 4 ounces using only a 3-cup and 5-cup container. Here's why:

* Conversion: There are 8 fluid ounces in 1 cup.

* Your containers: Your containers are much larger than 4 ounces (3 cups = 24 ounces, 5 cups = 40 ounces).

You would need a smaller measuring tool to accurately get 4 ounces.