A test system of a fluid pump which has a pump includes a test fixture which supports the fluid pump, a fluid flow path, and a connecting pipe arranged at the test fixture and having one end side connected to a discharge port of the pump and the other end side connected to the fluid flow path. The disclosed arrangement includes an overload clutch arranged between the gear and the seat-belt spindle. The second stacked structure has a tapered shape which narrows upward. In response, the RFID tag of that container is read using the RFID reading unit to determine an identification code of the container.