Milan designers Gabriele and Oscar Buratti have collaborated with bathroom brand Roca to create a combined toilet and wash basin, where waste water from the sink is used to fill the toilet cistern. Called W+W, the design filters and stores waste water from the basin and uses it to fill the cistern of the toilet. Users can divert waste water from the basin into a reservoir or the mains waste, depending on what it has been used for. If the reservoir is empty, the toilet cistern can be filled from mains water.
