The present invention relates to a multipurpose water bottle, which comprises: a water bottle main body having a reception space for receiving a liquid therein; and a cap coupled to an upper part of the water bottle main body to discharge the liquid to the outside, wherein the cap comprises: a main body coupling tube coupled to a cap coupling tube disposed at the upper part of the water bottle main body; a liquid discharge tube disposed at an upper part of the main body coupling tube to discharge the liquid to the outside; and an inner coupling tube disposed inside the main body coupling tube and coupled to a first discharge port of a first kind of water bottle, which is received in the reception space of the water bottle main body, to guide, to the liquid discharge tube, a first auxiliary liquid which has been received in the first kind of water bottle.