What is a benchmark for a cup?

Simple. pull it out

it really depends on what the cups are measured by. for instance, in a 20mL cup, you can put 2 10mL cups of liquid in it.

well they sell those weird cups in target , walmart and in Sam's club of course you can get in by a member card well thanks and later

5 cup

Four, just like four quarters of anything make a whole.