The AOK portable ionizer converts regular water into alkaline and ionized water that you can drink almost anywhere, anytime. Weighting in about a pound with a maximum capacity of 10oz this unit is also small enough to carry in a handbag or just use the supplied shoulder strap. Applied technology is demonstrated with this water bottle! No maintenance is necessary except changing the inexpensive filter about once a year. The water bottle uses 13 types of minerals in its filter including Tourmaline, Zeolite and Maifanshi stone and have been scientifically combined to give the optimal effect to the source water imparting qualities that are desirable in drinking water.