This is Soil Freshen for Fridge, a refrigerator deodorizer. I used it in my refrigerator for about a month, but I no longer need it, so I am selling it. The following is a product description: —— Freshen for Fridge is a dehumidifying and deodorizing agent for refrigerators, from the popular "Freshen" series, which specializes in high deodorizing effects. It contains a special blend of diatomaceous earth, recycled ash, and large-grain charcoal. The slanted slits increase the surface area, resulting in a higher deodorizing effect. The slim shape fits easily into dead space in the refrigerator and doesn't get in the way of refrigerated items. It's also a great point that it can be reused by exposing it to the air and drying it. *The usage period is approximately six months to one year. It varies depending on the usage environment.