Amazing Technology! The Natures Head Dry Composting Toiletis a user-friendly, patented design that pre-separates solids from liquids, allowing for greatly increased holding capacity and odor preventionwhen compared to other composting toilets. More infrequent emptyingmeans less maintenance time for you. A standard-size seathas been molded with safety and comfort in mind, while the off-white granitecolor blends into most bathroom decors. The hand crank agitatorin the base section helps speed up the natural composting process. A trap door and lever provide visual containment of solids.