This Kyusu was custom designed by one of the leaders in Japanese tea, Shinya san. He is considered one of Japan's finest producers of green tea and has scored the almost impossible 100/100 in Japan's most prestigious tea evaluating contests. Growing up in the business has given him plenty of time to think about what is most important to a great cup of tea: great water, great tea, and a great brewing vessel. This matte black kyusu holds a maximum 13 oz and is lidless with an elongated top lip. The tea has plenty of room to open - ensuring maximum flavor.