The present invention relates to a disposable paint spray mixing cup, and more particularly, includes a lid, a connecting member, and a container, inserting the container into the connecting member, combining the lid and the connecting member, and sealing the container by pressing the container with the lid. It is possible to prevent leakage due to the inclination of the cup, and it is possible to provide a disposable paint spray mixing cup capable of facilitating pressure control during liquid discharge by having a pressure control hole and a pressure valve in the lid.
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