The present disclosure discloses a lid, including a lid body having an outlet, a sealing member connected to the lid body and configured for sealing the outlet in a sealing state, the sealing member can include a first end, a middle part, and a second end; a first magnetic member disposed inside the middle part of the sealing member, a driving member mounted and movable inside the lid body and configured for pushing the sealing member to rotate and unseal the outlet; a second magnetic member disposed inside the driving member; and wherein the first magnetic member can attract the second magnetic member to maintain the sealing member at the sealing position and close the outlet.