All of our cha hais are individually handmade. The clay blends we use and glaze formulations from all natural materials. We never add any toxic materials to our products. Some of our clays and glazes feature locally sourced materials from the pristine mountains, streams and forests around our studio in Taiwan. Each cha hai is designed to be specifically used for serving tea. With this in mind we choose clays with nice tactile quality and glazes that pair well with premium teas.