Thank you for viewing. This is the "Ion Bottle Aya," made using Shigaraki-yaki techniques. The interior is coated with a glaze containing radium ore. Simply fill it with tap water and let it sit overnight to enjoy water that is smooth and pleasant to drink. Capacity: Approximately 900ml, sized to fit in a refrigerator door pocket. Design: Features an easy-to-hold form and beautiful glaze colors, blending well with both Japanese and Western dining settings. Uses: Besides water, you can also use it for alcoholic beverages such as shochu, sake, and wine, which are expected to become smoother in taste. Condition: New and unused. Comes with a dedicated cork stopper. Notes: As this is a ceramic product, please refrain from using it in a microwave or dishwasher. Due to being handmade, there may be individual differences in the glaze flow and color. Please understand this as a characteristic of handmade products. If you have any questions, please feel free to comment. We will respond promptly.