The Advantage Yellow Jacket Trap is made of heavy-duty molded plastic. Each trap includes a disposable liner for easy clean-up. Extra liners are sold separately. The trap can also be converted to capture flies and other flying insects by changing the type attractant/lures. Because of the dual, top-and-bottom entry holes, a chimney effect is created — dispersing the lures and attractants out over a 30-foot radius from the trap in all directions.