Abstract: A leakage-proof cup with a cup body and a cup cover has an insertion hole penetrating through the cup cover, a sealing element made of an elastic material detachably connected in the insertion hole, and a notch for a straw to be inserted into the cup body formed in the sealing element. The outer edge of the lower end of the sealing element is provided with a flange annularly distributed along the sealing element and extending in a radial direction. The insertion hole is provided with a first step matched with the flange. When the sealing element is connected to the insertion hole, the flange is abutted against the first step. When the straw is taken out of the insertion hole, the sealing element is reset under the elastic force of the sealing element and closes the notch so the water in the cup cannot be spilled out.

Abstract: A leakage-proof cup with a cup body and a cup cover has an insertion hole penetrating through the cup cover, a sealing element made of an elastic material detachably connected in the insertion hole, and a notch for a straw to be inserted into the cup body formed in the sealing element. The outer edge of the lower end of the sealing element is provided with a flange annularly distributed along the sealing element and extending in a radial direction. The insertion hole is provided with a first step matched with the flange. When the sealing element is connected to the insertion hole, the flange is abutted against the first step. When the straw is taken out of the insertion hole, the sealing element is reset under the elastic force of the sealing element and closes the notch so the water in the cup cannot be spilled out.