Botanical essential oil blends available in frosted amber Diffusers with two sizes to choose from. 125mL - ideal for bathrooms and ensuites, hallways or office desks. Will last for 2-3 months. 250mL - better suited for the more spacious rooms in the house like lounge rooms and large bedrooms. Will last 4-5 months. How to use: 125mL - lift up the metal tab and pull in the direction of the arrow. The metal ring should loosen and completely come off. Next, remove the rubber stopper and put the reed sticks in. 250mL - unscrew black cap, remove rubber stopper. Screw the black cap back on and insert reed sticks. For the best scent dispersion make sure to rotate your reed sticks weekly.