Installing the operational parts of the woo woo was a bit easier. This is a composting toilet which means that all waste is stored in a tank which is so designed that the liquid evaporates and the solid material composts (with the help of handfuls of wood shavings). Once the tank is full, we just wheel it out and replace with another tank. After about a year, the tank contents have turned into compost. This process makes it odourless and better for the environment than using chemicals.