Abstract: A water storage bottle comprises: a shell, on which is provided with a first opening and a second opening. The shell includes a water bag, disposed in the shell, an inner side of the water bag is connected and in communication with the first opening, and a cavity is formed in the water bag, connected and in communication with the second opening. The water storage bottle is simple to use, easy to install, and low in cost. Air and water in the water bag can be expelled out completely, so no back pressure is produced. As such, space utilization of the water storage bottle is raised, in achieving space saving.