Ink cartridges

An ink cartridge, comprising:

• a first wall;
• a second wall opposite the first wall;
• an ink supply portion positioned at the first wall, wherein the ink supply portion is configured to dispense an ink from an interior of an ink chamber to an exterior of the ink chamber;
• an air intake portion positioned at the first wall and configured to draw air into the interior of the ink chamber, such that the air contacts the ink within the ink chamber;
• at least one third wall which is substantially perpendicular to each of the first wall and the second wall;
• a fourth wall which is substantially perpendicular to each of the first wall, the second wall, and the at least one third wall;
• and
• a fifth wall opposite the fourth wall, wherein an area of the at least one third wall is greater than each of an area of the first wall, an area of the second wall, an area of the fourth wall, and an area of the fifth wall, wherein a first recess is formed between the at least one third wall and the fourth wall, and the first recess extends from the first wall towards the second wall, wherein a second recess is formed between the at least one third wall and the fifth wall, and the second recess extends from the first wall towards the second wall, wherein the fifth wall has a concavity formed therein, and an exposed base surface of the concavity intersects and is flush with an exposed base surface of the second recess.