Effective Natural Cooling: Uncoated clay relies on porosity; very small amounts of water evaporate through the pores of the outer wall, and this evaporation process draws heat from the inside and lowers the temperature of the stored water, making it naturally cool and refreshing. Water Filtration and Purification: Natural clay acts as a traditional filter that helps purify water from some impurities and adjust the water's alkalinity (pH), making it healthier and easier on the stomach compared to storing water in plastic containers. Condition: New Capacity: 10 liters