The flat glass can be sipped downward, so the drink will spread into your mouth and you can see the taste of it.(Perfect for drinking liquor) • Stomach when you put your mouth, giving you a clean and elegant drinking experience. It is flat so it is easy to pocket and it is easy to carry around as a "mouse-kazuki" bag. ("Gaup" and "Wine Glass" are facing upwards and straight into the throat, and the way you drink it gokin. )