Rotatable cup holder

The utility model discloses a rotatable cup holder which comprises a supporting disc, an anti-toppling cap, a plug and a ball, a bearing is arranged in the middle of the surface of the supporting disc, a supporting rod is inserted into the bearing, the surface of the supporting rod is connected with a placing table in a sleeved mode, a cavity is formed in the supporting rod, an elastic plug penetrating through the supporting rod is arranged in the cavity, and the ball is arranged in the elastic plug. The anti-tilting cap is installed on the surface of the supporting rod and connected to the upper portion of a bearing inner ring in a sleeving mode, the plug is inserted into the cavity and abuts against the surface of the elastic plug, the balls are arranged on the surface of the supporting disc, the containing table is connected with the balls in a rolling mode, and the containing table is supported in an auxiliary mode through the multiple sets of balls. It is ensured that when the gravity borne by a certain