Liquid containing assembly

A liquid containing assembly, comprising:

• a clamping device, comprising a first surrounding body and a second surrounding body rotatably connected to the first surrounding body, wherein a clamping space is formed when the first surrounding body is closed to the second surrounding body;
• a supplementary package, comprising an accommodating body configured to accommodate liquid and an open tube connected to the accommodating body;
• and
• a positioning mechanism, comprising:
• a first positioning portion, disposed on a portion of the accommodating body of the supplementary package adjacent to the open tube, and at least partially surrounds the accommodating body;
• a second positioning portion, corresponding to the first positioning portion and disposed at least on one of the first surrounding body and the second surrounding body;
• a third positioning portion, disposed on the accommodating body of the supplementary package, wherein the third positioning portion is away from the open tube relative to the first positioning portion;
• and
• a fourth positioning portion, corresponding to the third positioning portion and disposed at least on one of the first surrounding body and the second surrounding body;
• wherein one of the second positioning portion and the fourth positioning portion achieves the rotation positioning of the supplementary package in the clamping device, and the other achieves the longitudinal positioning of the supplementary package in the clamping device.