Cup

The invention discloses a cup which comprises a cup body, a plug connected with the cup body through a line and a socket connected with the plug in a matched mode. A cup handle is fixedly arranged on the end face of the right side of the cup body, a sheath is fixedly arranged on the cup handle, a sliding cavity with an opening facing the right is formed in the socket, a slide block is smoothly installed in the sliding cavity, a plug slot with an opening facing the right is vertically and correspondingly formed in the sliding block, a first electric pin piece is installed in the plug slot, a powering-on bolt is fixedly arranged on the left end face of the sliding block, a bolt groove matched with the powering-on bolt is arranged in the left end wall of the sliding cavity, vertically extending push-abutting grooves are correspondingly formed in the upper end wall and the lower end wall of the sliding cavity, sliding arms are smoothly installed in the push-abutting grooves, second electric pin pieces are fixedly