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