Room diffusers give that little burst of fragrance to your room with out the need of lighting candles. Please note that one you place the reeds in to the diffuser it can take up to 3 days for the scent to Disperse as it take time to travel up the reeds. Depending on fragrance. Some will fragrance straight away. Please do not flip the reeds. As this can clog and block the reeds stopping all fragrance from coming through. 100ml.