How much does a teacup hold, and how much does a bucket hold? This 3rd grade cups pints and gallons worksheet starts from the size of each container, so your child pictures it before naming a unit. It uses customary units: tablespoons, fluid ounces, cups, pints and gallons. For each of the six containers, two amounts are offered, and only one is sensible. A watering can, for example, holds about 2 gallons, not 2 cups. The second page is an answer key that ticks the right box and says why the other unit is too big or too small.