In one exemplary embodiment of a fluid storage container or cartridge that can be reused, the ink cartridge can have an ink storage unit that stores waste ink, an ink inlet/outlet disposed in a frame part that can be the outside wall of the ink storage unit, an ink path of which one end communicates with the ink inlet/outlet and the other end is disposed opening into the ink storage unit, wall parts that divide the ink storage unit into an upper air chamber and a lower fluid chamber that communicate with each other through a communication path, and an outside air channel, of which one end communicates with the air chamber and the other end enables communication with the outside at a position further from the air chamber than the fluid chamber. Other embodiments of fluid storage containers and methods of removing fluid therefrom are also disclosed.