Wei Collection, Upper Volume
Radical: Bamboo (zhú)
筲
Kangxi strokes: 13
Page 886, Entry 03
Broad Rimes (Guangyun) and Correct Rimes (Zhengyun) indicate the pronunciation is shao. Collected Rimes (Jiyun) also indicates the pronunciation is shao. Doushao refers to a bamboo vessel.
Ceremonial Rites (Yili), Section on Final Rites: Three shao of millet, broomcorn millet, and wheat. Commentary: The shao is a type of basket; its capacity is roughly the same as a gui vessel.
Yangzi's Regional Expressions (Fangyan): In southern Chu, it is called shao.
Furthermore, Classified Chapters (Leipian) notes that in Chenliu, a rice brush is called a shao. Another definition is a rice vessel with a capacity of five liters. Another definition states that in the states of Song and Wei, a chopstick cylinder is called a shao, which is the same as the character for bamboo tube.
Additionally, Collected Rimes (Jiyun) indicates the pronunciation is shuo. The meaning is the same.