The steamroller pipe consists of a hollow tube open at both ends, a bowl on one side near one end and roll stoppers on the base. You cover the end nearest the bowl with your hand while inhaling the smoke into the tube. Simply release your hand from the end to create the vacuum and inhale the smoke. Sold in mixed colors.
Steamrollers aka shabongs are renowned for being harsher on the throat than water bongs, but this is often cited as part of their appeal.
The pipes come in small, medium and large, check the menu for more variety.