Pure Essential Oils Aura Cacia's Terra Cotta Diffuser gives you a wonderful way to enjoy the benefits of aromatherapy. Its porous surface gently disperses the essence of the oil into your environment. Since it doesn't require heat, this diffuser is ideal for absolutes and citrus oils, some of which are chemically altered by heat. Use your diffuser with Aura Cacia 100% pure essential oils to enhance your mood or freshen the air in your home, office or car.