The DampRid 7.5-pound refill container is designed to replenish the Mega Refillable Moisture Absorber and is your solution for a non-electric dehumidifier and musty odor eliminator. DampRid works by attracting and trapping excess moisture to maintain optimal humidity levels. Use this mega 7.5-pound refill container for long-lasting fresher, cleaner air. When your Mega Refillable Moisture Absorber has filled with water and the crystals have dissolved, simply pour the water down the toilet (septic safe) and replenish with this convenient resealable refill for months of uninterrupted freshness. Keep out of reach of children. Read and follow all label directions.