Cup

The invention discloses a cup which comprises a cylindrical cup body (1), a first cup sleeve (4), a second cup sleeve (3) and a third cup sleeve (2). A cup cover is arranged on the top of the cup body. The cross section of the first cup sleeve, the cross section of the second cup sleeve and the cross section of the third cup sleeve are all circular, the longitudinal section of the first cup sleeve, the longitudinal section of the second cup sleeve and the longitudinal section of the third cup sleeve are all trapezoid, the diameter of the cross section of the top of the third cup sleeve is equal to the diameter of the cup body, the height of the first cup sleeve, the height of the second cup sleeve and the height of the third cup sleeve are sequentially increased, and the sum of the height of the first cup sleeve, the height of the second cup sleeve and the height of the third cup sleeve is equal to the height of the cup body. Clamping blocks I (7) are arranged on two sides of the outer portion of the lower end of the second cup sleeve respectively, and clamping blocks II (6) are arranged on two sides of the outer portion of the lower end of the third cup sleeve respectively. The bottom end of the third cup sleeve is arranged at the top end of the second cup sleeve in a clamped mode, the bottom end of the second cup sleeve is arranged at the top end of the first cup sleeve in a clamped mode, the cup body is arranged in a space formed by the three cup sleeves, and the bottom of the cup body is fixedly connected with the bottom of the first cup sleeve. The cup has the advantages that the three cup sleeves are arranged, the third cup sleeve or the third sleeve and the second cup sleeve can be pressed down, and then cooling speed is high; the third cup sleeve or the third sleeve and the second cup sleeve can be lifted up, then thermal insulation effect is good, and the cup is convenient to use.