Water Dispenser UV-LED Bottom LoadedBottle water redefined This floor standing bottled water dispenser comes with a UV LED disinfection function which kills up to 99. 9% bacteria in the cold water tank** to ensure the cleanness of water. UV kills 99. 9% bacteria in the cold water tank** Bottom loading Three nozzles UV UV LED kills 99. 9% bacteria in the cold water tank** Since there's no chlorine, bacteria tend to grow in the water that sits inside the bottle or the cold water tank.