There are a variety of cylinder machines available on the market today. The most common type of cylinder machine is the plunger type. A plunger type of machine consist of a plunger arm and a colander arm. The Colander arm grabs the dirty water and the plunger arm pushes it through the hole in the top of the colander while it's spinning. This allows for easy cleanup by just dumping the water onto the Dirty Water Can and stirring it around to get all of the dirt and debris out.