A volatile composition dispenser (10, 110, 210, 310) comprising: a volatile composition container comprising at least one volatile composition therein; a rupture element (44, 144) positioned proximate to the volatile composition container; and a cam (20, 220) comprising a camming surface, wherein the camming surface is configured to move at least a portion of the rupture element (44, 144) toward the volatile composition container to puncture the volatile composition container and release at least a portion of the volatile composition from the volatile composition container such that the portion of the volatile composition evaporates and exits the volatile composition dispenser (10, 110, 210, 310), an outer shell (14, 114), wherein the outer shell (14, 114) comprises at least one vent (16, 18, 116, 118) configured to be placed in fluid communication with the volatile composition, and wherein the dispenser further comprises an air flow adjustment member configured to be moved at least partially over the at least one vent (16, 18, 116, 118) between a first position, in which a first air flow is permitted through the dispenser, and second position, in which a second air flow is permitted through the dispenser, and wherein the volatile composition dispenser is capable of being attached to a vent of an air handling system of a vehicle by engaging a mounting portion of the dispenser, such that air being forced or blown out of the vent by the air handling system, can flow through the volatile composition dispenser to deploy the volatile composition from the volatile composition dispenser to an interior space or passenger compartment of a vehicle. a volatile composition container comprising at least one volatile composition therein; a rupture element (44, 144) positioned proximate to the volatile composition container; and a cam (20, 220) comprising a camming surface, wherein the camming surface is configured to move at least a portion of the rupture element (44, 144) toward the volatile composition container to puncture the volatile composition container and release at least a portion of the volatile composition from the volatile composition container such that the portion of the volatile composition evaporates and exits the volatile composition dispenser (10, 110, 210, 310), an outer shell (14, 114), wherein the outer shell (14, 114) comprises at least one vent (16, 18, 116, 118) configured to be placed in fluid communication with the volatile composition, and wherein the dispenser further comprises an air flow adjustment member configured to be moved at least partially over the at least one vent (16, 18, 116, 118) between a first position, in which a first air flow is permitted through the dispenser, and second position, in which a second air flow is permitted through the dispenser, and wherein the volatile composition dispenser is capable of being attached to a vent of an air handling system of a vehicle by engaging a mounting portion of the dispenser, such that air being forced or blown out of the vent by the air handling system, can flow through the volatile composition dispenser to deploy the volatile composition from the volatile composition dispenser to an interior space or passenger compartment of a vehicle.