This bowl will keep you and your matcha tea warm for a long while. Slowly sipping it while watching the the monsoon rains hit our shores. Hand made ceramic will change colour over a long period of usage. Seasoned and tested for leakage, just give it a rinse and it is ready to use. Hand pinched, raku clay. Gas Fired Cone 10. 1300°C. Sugarcane Ash Glaze & Hikidashi Glaze.