The Porta Potti Qube 165 is made to be simple, easy and hygienic. It can be used for 3-5 days of average use before the waste tank requires emptying. The waste holding tank can be easily detached and taken to the nearest waste disposal point. To empty, just twist the integrated emptying spout outwards, unscrew the cap, push the vent button to allow air to enter the waste tank (to avoid any splashing) and then pour waste out. Clever and convenient.