From Frédéric Malle, the USB-rechargeable Fleur Mécanique II diffuser: "To create Fleur Mécanique II, Frédéric Malle concocted, like a mad scientist, a device that is both simple and wonderfully complex which adapts the scents to each person’s space and mood. The fan allows one to control the intensity, duration, and frequency of diffusion of one's favorite perfume. Using dimmers and timers, the perfume is diffused at the desired intensity. Effortless and instantaneous, the cartridge can be changed in the blink of an eye to adapt a home fragrance to one's mood. An immediate change of atmosphere." $730 at Saks; the cartridges (sold separately, available in Jurassic Flower, Café Society, Saints des Saints, Rosa Rugosa and 1er Mai) are $60.