What type of measurement would you use to describe the amount of water a pot can hold?

-ounces if the pot is smaller
-gallons if it is a large pot

Measuring the amount of water means that you are measuring volume.
This means that the type of measurement that would be used is the measurement of the volume.

Some of these measurements are:
m^3 and cm^3
liters and milliliters
ounces
gallons

Hope this helps :)