Cups, pints, quarts, and gallons (third grade math)

A lesson on liquid volume for 3rd grade! I show in real life (with colored water, jars, cup, and measuring cup) that a coffee cup indeed measures one cup, and that two cups make a pint, and that two pints make a quart. I'd like to encourage children to do these same "measurements" because when you get hands-on, it helps you learn the measuring units much better!