This diffuser set is composed of a decorative glass decanter and 15 diffuser reeds.It has to be completed with a perfume refill sold separately, selected by you. Compose your perfume diffuser set: Select your favorite perfumed refill. Pour the perfumed refill into the glass decanter. For a light fragrance diffusion, only use 10 reeds & half of the perfume. For an intense fragrance diffusion, use all of the reeds and all of the perfume. Place the reeds into the decanter in the form of a bouquet. Thanks to its diffusing system, the fragrance absorbs into the reeds much like water delicately ascending into the stream of a plant. The perfume refill will fragrance your home for up to 5 weeks.