Painting Roller,Mini Foam Paint Roller,Mini Paint Roller,Microfiber Dynamic Paint Runner Roller Jiangmen Nichiyo Decorative Material Co.,Ltd. , https://www.nichiyopt.com A young student studying art at the Royal College of London invented a water-saving and energy-saving shower system. The new invention has just won the 2005 British Standards Agency Environmental Design Award. The working principle of this system is to use a vacuum pump, the used water into the filter box, and then into the heater installed in the rear of the shower head heating and recycling. Scientists say the system can save an average family £ 170 a year in water bills.