Driven by a spirit of innovation, diptyque has reinvented the concept of home fragrance with the hourglass diffuser. Just turn it over to begin a new diffusion cycle lasting approximately one hour and enjoy a delightful sensory experience: the diptyque hour. Ideal for scenting small spaces over a period of several months until the fragrance evaporates completely, it can then be refilled one time with the same scent. Recommended use 1. Remove the cap from the refill container. 2. Assemble the two glass sections. The bottle containing the fragrance should be at the lower section of the hourglass diffuser. The empty section equipped with the diffusion system screws onto the refill containing the fragrance. Screw tight. 3. Turn the hourglass over to begin the diffusion cycle. During the cycle, silence… do not disturb! Do not turn over the object! We also strongly advise avoiding placing the hourglass directly on surface fragments such as wood, old paintings, marble.