Gallon Bot is a graphical creation that allows students to better visualize the units of capacity measurement. Gallon Bot has a gallon-sized body and four quart-sized arms, because there are four quarts in a gallon. Each quart-sized arm extends to pint-sized lower-arms, because there are two pints in a quart.
When students learn to draw a quick sketch of Gallon Bot, they'll always know how how to convert from cups to quarts to gallons to pints.
If you do a Google search, you'll see that Gallon Bot also goes by other names, such as Gallon Man, Mr. Gallon, and Gallon Guy. (I haven't seen a Ms. Gallon yet, but I'm sure she's out there!)