Abstract: A cup cover switch includes a cup cover body and a switch body, the switch body is mounted in the cup cover body; the switch body includes a water sealing plate, a clamping cap, a threaded column, a rotary knob, a switch cover and a silica gel sealing gasket; the switch cover is located above the cup cover body, the threaded column is mounted in the switch cover, and the threaded column is in threaded connection with the switch cover in a penetrating manner; the rotary knob is integrally arranged at an upper end of the threaded column, the switch cover is fastened by the rotary knob, and the lower end of the threaded column is connected to the clamping cap; middle portion of the threaded column is in threaded connection with the water sealing plate, and the water sealing plate is located below the cup cover body.

Abstract: A vacuum insulation lid or plug comprises stainless steel housing. The housing has a vacuum cavity and has an evacuation hole on it. The evacuation hole has a sealing solder seal block on it. The housing includes a downwardly opening outer cover and a downwardly opening inner cap, the outer cover and the inner cap are welded together with an inner cavity that is formed between the outer cover and the inner cap, and the inner cap is pressed to form an internal thread. Or, the housing comprises an upper cover and a lower cylinder, the lower end of the lower cylinder is closed, the outer diameter of the lower cylinder is smaller than the outer diameter of the upper cover, the upper cover and the lower cylinder are connected by welding and the interior of the lower internal cylinder and the interior of the upper cover form the inner cavity, the side wall of the lower cylinder is pressed to form an external thread and a groove, and a waterproof seal ring sets in the groove.