Ochokos are small vessels intended for the mindful intake of sake (as opposed to perhaps throwing back a shot glass). The ochokos are all different in the set as each guest is invited to choose their preferred cup prior to the meal. This cup is also known as a guinomi.
Each order comes with one ochoko cup. Shida Thojiki was established in 1909 as a specialized company for Shida ware (a type of Arita ware).