... Tourmaline stone2,Maifanite,3,Far infrared stone,4,Calcium ion,5,Nano silver powder Diameter:4.7cmColors : Black , Silver , Gray , Pink .The EHM Nano Energy Water ... need know the five main functions of Nano Energy Water Cup.The Nanometer energy cup is able ... to turn the ordinary water into the health water of micro-electrolysis with five ... s mind stay fresh and energetic. Alkaline water bottle