Inhalation is one of the most common and easiest ways to enjoy the therapeutic benefits of essential oils and using them in a diffuser will create the perfect ambiance and mood in your home. The Light Wood Effect USB Diffuser comes with two 9ml bottles of essential oils. Lavender Oil is great for relieving stress or anxiety and studies suggest that it helps reduce sleep issues. Our Sleep Well Oil contains a blend of Lavender, Sandalwood and Mandarin Oil, which help to improve sleep quality. Holds up to 130ml and changes colour to create a truly relaxing atmosphere.