Porta Potti 365 Marine Toilet. The Porta Potti Qube 365 is a family size portable toilet with a high capacity waste holding tank and a natural seating height.. Features:. White or ivory finish. Manual flush, piston pump. Integrated pour-out spout. Integrated cover-lock on all models. Benefits:. Modern, refreshed design. Improved valve handle system. Improved carry handle of the waste holding tank. Improved seating comfort. Brochure (pdf)