Instructions for use: - Remove the cap from the refill container - Assemble the two glass sections. The bottle containing the fragrance should be at the lower section of the diffuser - The empty section equipped with the diffusion system fastens onto the refill containing the fragrance. Screw tight. - Turn the hourglass over to begin the diffusion cycle and do not turn again - We strongly advise avoiding placing it directly on wood, old paintings and marble surfaces - 75ml/ 2.5fl.oz.