this invention provides an air freshener dispenser device which consists of twin cartridges which are connected end - to - end with a flexible hinge means . the two cartridges can be folded together and incorporated in a dispensing holder as multiple refill units . each cartridge is composed of a shallow tray which contains a volatile air freshener medium , and which has its open surface sealed with a coextensive bonded laminate of an inner vapor - permeable membrane and an outer peelable vapor - impermeable membrane . removal of the peelable vapor - impermeable membrane sealing the two trays allows delivery of the air freshener medium as vapor into the environment at a controlled rate over an extended period of time .