ohisu blue washboard basin for hand washing clothes and small delicate articles ohisu the ohisu washboard basin assists cleaning your small or delicate articles. the 4 quart basin fits in most sinks and fills up quickly with hot soapy water. soak your stains in the soapy water while using the ridged washboard to rub away the stains. rinse off to clean and it easily stores away in your cabinet. perfect for washing underwear, socks, cloth diapers, and more!