Searching for an air freshener that didn't trigger allergies or asthma was a tougher project than I expected and thus was the beginning of the handmade clay air freshener. Each air freshener is handmade using earthenware clay and a hand carved texture roller. To use, place 2-3 drops of essential oil onto the clay disc and hang it wherever you need a little aromatherapy or fragrance. I have one in the car, the laundry room, the closet, on the lamp next to my bed...you get the idea. You get to control the quality of fragrance that you surround yourself with. My personal favorites are Bulgarian Lavender and Sweet Orange.