The Potpourri Dish is designed as an accompaniment to take out the smell in the room when you use your Arizer Solo. You might not notice the smell because you’re used to it, but sometimes aromatherapy is necessary especially when you expect some guests coming in. A little citrus, lavender, orange, tangerine, or any other essential oil dropped on a cotton ball and left on the dish will leave your room smelling wonderful. This Potpourri Dish is also compatible with the Arizer Solo 2, Arizer Air and Arizer Air 2. Essential oils are not included when you purchase the dish.