A cartridge that is configured and arranged to be mounted on a printer that has a first ink supply pipe and a second ink supply pipe includes a bottom wall, a plurality of printing material supply ports, a single main chamber, and a plurality of flow paths. The plurality of the printing material supply ports are provided on the bottom wall. The plurality of the printing material supply ports protrude from the bottom wall in a −Z axial direction and are aligned in a Y axial direction perpendicular to the −Z axial direction. The single main chamber is configured and arranged to contain a printing material. The plurality of the flow paths communicate with the single main chamber and the plurality of the printing material supply ports, respectively, and the plurality of the flow paths are aligned in the Y axial direction.