Saver allows reusing the water of the sink in the WC making use of the pressure difference between the Saver tank’s inside and outside pressure. This product is viable, simple, easy to use and efficient. Moreover, it allows saving 20 litres per user a day. The main goal of this project was to design a product that would deal with the World’s water shortage problematic by 2020. Therefore, Saver has been design so as to make the society aware of the necessity of preserving natural resources, eco-friendly (sustainable lifeclycle, sustainable materials and non electric powered mechanism) and to be comfortable for everyone (taking into account its user friendliness). My work: water situation research, state of art of water devices, create concepts, 3D modelling and rendering.