Aroma Dri 750gm Lavender Scented Silica Gel Steel Canister Scented silica gel can last up to 1 year, varies depending on your conditions Aroma dri is the original air freshener/dehumidifiers on the market Perfect to use in bathrooms, closets, cabinets, rv's, boats, etc, to help fight moisture issues while refreshing the area Aroma dri silica gel is non-toxic and an inert material