An ink cartridge includes an ink chamber comprising a first wall, and an ink dispensing portion disposed within the ink chamber. The ink dispensing portion has a dispensing chamber formed therein, and a first end of the dispensing chamber is positioned adjacent to the first wall. The ink dispensing portion includes a second wall which bounds the dispensing chamber, and the second wall has an opening formed therethrough adjacent to a second end of the dispensing chamber opposite the first end of the dispensing chamber. Moreover, the dispensing chamber is configured to communicate with the ink chamber via the opening of the second wall. The ink cartridge also includes a rib member extending from an exterior surface of the second wall. The rib member includes an open end and a closed end, and the closed end of the rib member surrounds the opening of the second wall. In addition, the open end of the rib member is positioned adjacent to the first wall.