Effortlessly transform any E.G. essential oil or synergy blend into a reed diffuser with a few simple steps. Made from natural wood, the petite reed diffuser is perfect for small spaces yet powerful enough to invigorate any room. Things To Know The reed diffuser takes about 1-2 hours to absorb and emit an aroma. To refresh, flip the reed sticks every 1-2 days. Works best with a 10 ml bottle. A 10 ML of essential oil should last about 1-2 weeks. Although the oil absorbs quickly, the reed sticks will keep diffusing aroma.  Includes 1 Wood Tray 1 Collar Cap 8 Reeds *Essential Oil Bottle Not Included