Santevia Mineral Stones combine maifan stones and bio-ceramic balls that continuously release essential minerals into your water, creating a smooth, refreshing taste. These stones add vital minerals such as calcium, magnesium, and other trace elements to support your overall health. They help maintain the pH balance of your water while enhancing its flavor, promoting healthy hydration. Compatible with both the Glass Water System and Gravity Water System, these Mineral Stones offer long-lasting performance with a filter life of up to 2 years.