| abstract |
A cap ( 1 ) for a container ( 2 ) housing a consumer product, comprising a device ( 7, 11 ) capable of diffusing a volatile substance inside said container, said device being formed of a cap liner element ( 8, 12 ) carrying the volatile substance and of a barrier element ( 10, 14 ) lodged between the cap liner element and the interior of the container, wherein said barrier element is formed of a membrane permeable to the vapors of the volatile substance and impermeable to the consumer product, so as to enable molecular diffusion of the volatile substance's vapors inside the closed container, so as to enable molecular diffusion of the volatile substance's vapors into the headspace above the consumer product when the container is closed. |