disclosed herein are devices for dispensing volatile vapors such as insecticides . table - like carrier members provide a compartment for the volatile material . one or more table leg structures extend down from a table top to support a cavity in the table top a distance above a burner element . this results in more moderate and uniform heating , thereby permitting efficient release of the volatile material over a longer period of time . in some versions the table leg structures and table top are formed as separate pieces and designed to permit side - to - side ventilation under the volatile .