Vacuum cup

The utility model discloses a vacuum cup, which comprises an outer cup with a heat insulation function, an inner cup with a heat insulation function and an outer cup with a heat insulation function, the inner cup has a heat conduction function, and external threads are arranged on the outer wall face of the open end of the inner cup. The cup cover covers the opening end of the inner cup and is provided with a threaded hole; the inner cup is sleeved with the outer cup, the threaded hole of the cup cover is connected with the upper portion of the outer thread of the inner cup in a meshed mode, and the inner thread of the outer cup is connected with the lower portion of the outer thread of the inner cup in a meshed mode. According to the utility model, the inner cup and the outer cup can be separated; after the inner cup is taken out of the outer cup, the heat dissipation speed of hot water in the cup can be increased through the heat dissipation function of the inner cup, and after the inner cup is placed in th