A bottom surface member of a container defines an xy plane, and a side surface member defines an xz plane and a yz plane. A protection member includes a receiving portion having a receiving surface parallel to the xz plane and a support portion integrally formed with the receiving portion. The receiving portion includes a first flat plate portion that includes the receiving surface and is parallel to the xz plane. The support portion includes a contact portion that is in contact with a side surface of the side surface member and a second flat plate portion parallel to the yz plane.