Oil Garden Oasis Ultrasonic Diffuser with Essential Oil Blend Refresh and Renew 12ml Release the powerful benefits of nature in a bottle with the Oil Garden Oasis Ultrasonic Diffuser. Using ultrasonic technology, the Oasis diffuser allows you to experience Oil Garden Pure Essential Oils in their purest form without heat, chemicals or toxins. Making it safe for you and your family. Refresh & Renew Essential Oil Blend 12mL: A citrus splash of pure essential oils blended with warming Ginger to uplift and refresh your mind and body.