High Quality Content by WIKIPEDIA articles! Sake set is a generic term for the flask and cups used to serve sake, the traditional Japanese alcoholic beverage made from rice. Sake sets are commonly ceramic, but may be glass or lacquered plastic. The flask and cups may be sold individually instead or as a set.The server of a sake set is a flask called tokkuri. Tokkuri are generally bulbous with a narrow neck, but may have a variety of other shapes, including spouted serving bowls (katakuchi). Traditionally, heated sake is often warmed by placing the sake filled tokkuri in a pan of hot water, and thus the narrowed neck would prevent the heat from escaping.