PurePail makes diapering pure and simple. From diapers to diaper pails & accessories, we’ve got stinky stuff covered. PurePail Charcoal Filters naturally eliminate odors with activated charcoal. Filters are fragrance and chemical-free ? and non-toxic. For maximum odor protection, replace every 30 days (or as desired). Fits PurePail Classic or Go Diaper Pails.