Size (height, diameter): 21.5cm, 7cmCapacity: about 420MLHydrogen ion water machine - can reduce the size of water molecules, more easily absorbed by the human body, also contains minerals to upgrade platinum and titanium electrolysis - only 3 minutes for rapid electrolysis, electrolysis technology promotes stable hydrogen water combination, high hydrogen concentration, stable it is good. 1.5L of water per day is equivalent to the antioxidant value of hundreds of fruits and vegetables. NATURALLY SAFE - Made of 100% food grade material, double layer of super eco-friendly food grade silica glass, super tough, durable and safe. More health benefits - hydrogen water can improve immunity, active hydrogen in hydrogen water can combine with free radicals, strong penetration, activate body cells, enhance immunity, promote digestion and excretion, and effectively improve metabolism. Simple and Safe -- One-button quick operation, USB charging, more economical than hydrogen water bag or h2w. Made of food grade borosilicate glass and 304 stainless steel, it does not contain any harmful chemicals. This ionized water bottle can be used about 15 times on a single charge, making office, travel, and work easy and convenient.