noun
straw lid for a rice container
Traditional item: a round, woven straw lid placed at each end of a cylindrical rice container (俵). Now mostly encountered in historical or cultural contexts.
昔の米俵には、両端に桟俵がはめられていた。
In the past, straw lids were fitted onto both ends of rice bales.
資料館で桟俵の実物を見た。
I saw an actual straw lid for a rice container at the museum.