System including liquid bottle configured to store recording liquid, tank configured to store recording liquid supplied from the liquid bottle, and hole

A system comprising:

• a liquid bottle having a connection port, the liquid bottle being configured to store recording liquid;
• a tank having a connection receiving port configured to be connected to the connection port, the tank being configured to store the recording liquid supplied from the liquid bottle through the connection port;
• and
• a hole surrounding the connection receiving port, the hole having a cylindrical shape,
• wherein the liquid bottle has a protrusion having the connection port, the protrusion being configured to be inserted in the hole, and
• wherein a shape of an outer peripheral surface of the protrusion in an axial direction in which a center axis of the protrusion extends corresponds to a shape of the hole, the shape of the outer peripheral surface of the protrusion in the axial direction being not rotationally symmetrical about a center of the protrusion.