Abstract: An improved device for dispensing a volatile substance into the environment includes a reservoir layer, having opposing first and second surfaces, for holding the substance and first and second envelope layers respectively in close proximity to the first surface and the second surface of the reservoir layer. At least a portion of at least one envelope layer is permeable to the substance. The reservoir layer and envelope layers are fused together at a first generally circular, continuous boundary at which the reservoir layer is nonpermeable to the substance to thereby define a generally circular region within which the substance is confined. The reservoir layer and envelope layers are further fused together at a second non-circular boundary completely enclosing the first boundary and the region to thereby define an outer, decorative, peripheral shape of the device.