A convenient lid, comprising a housing, a lid opening, a press plate, a button, an insertion plate, two guide plates and a threaded body, a water outlet, the lid opening and the threaded body being provided on the lower part of the housing, the side of the lid being provided with a first concave cavity, a fixing body and a guide column being provided in the first concave cavity, a switch device and a security device being provided on the fixing body and the guide column, the switch device being composed of a press plate and a movable shaft, the security device being composed of the button and a movable plate and being provided in the press plate, the guide plates, the insertion plate and a buckle plate being provided inside the lid, characterized by: a concave ring and a guide strip being provided on the outside of the lid opening and being in contact with a convex ring, and a guide slot, respectively, being provided on the inner side of the threaded body, such that a leak-proof bond between the lid opening and threaded body is achieved, and a latch being provided on the inner side of the threaded body, the movable shaft being provided with a retaining ring at the front end, a top ring and a slot column in the middle, and a seal block, a spring and the movable plate in the rear portion, the seal block being provided with a seal ring; a rubber ring being provided between the top ring and the slot column, the spring being provided on the slot column, the top ring and the retaining ring being mounted on the guide plates, the buckle plate being provided with a shaft hole at one end and a card slot at the other end, the insertion plate being provided with a circular hole at one end thereof, an insertion body at the other end, and a rotating shaft in the middle, the rotating shaft being connected with shaft hole of the buckle plate, and the rotating shaft being connected with the guide plates inside the lid, the insertion plate being connected with a top plate, the top plate being provided with a soft edge and a pin, the pin is connected with the circular hole on the insertion plate, the soft edge is provided on the back of the water outlet, the guide plates forming an elongated slot configured to receive the insertion body, the guide plates being provided within the housing, a second concave cavity being provided on the press plate, the button being provided on the second concave cavity, a blocking plate, a fixing column and a square hole being provided on the movable plate, a further spring being provided on the fixing column, a non-slip strip and a square body being provided on the button, the square body being connected to the square hole on the movable plate, such that the movable plate moves down when button is slid downwards and returns to the initial position when the button is released, and such that when the press plate and the button are pressed and slid downwards at the same time, the movable shaft is pushed forward pivoting the insertion plate around the rotating shaft and uncovers the water outlet. a concave ring and a guide strip being provided on the outside of the lid opening and being in contact with a convex ring, and a guide slot, respectively, being provided on the inner side of the threaded body, such that a leak-proof bond between the lid opening and threaded body is achieved, and a latch being provided on the inner side of the threaded body, the movable shaft being provided with a retaining ring at the front end, a top ring and a slot column in the middle, and a seal block, a spring and the movable plate in the rear portion, the seal block being provided with a seal ring; a rubber ring being provided between the top ring and the slot column, the spring being provided on the slot column, the top ring and the retaining ring being mounted on the guide plates, the buckle plate being provided with a shaft hole at one end and a card slot at the other end, the insertion plate being provided with a circular hole at one end thereof, an insertion body at the other end, and a rotating shaft in the middle, the rotating shaft being connected with shaft hole of the buckle plate, and the rotating shaft being connected with the guide plates inside the lid, the insertion plate being connected with a top plate, the top plate being provided with a soft edge and a pin, the pin is connected with the circular hole on the insertion plate, the soft edge is provided on the back of the water outlet, the guide plates forming an elongated slot configured to receive the insertion body, the guide plates being provided within the housing, a second concave cavity being provided on the press plate, the button being provided on the second concave cavity, a blocking plate, a fixing column and a square hole being provided on the movable plate, a further spring being provided on the fixing column, a non-slip strip and a square body being provided on the button, the square body being connected to the square hole on the movable plate, such that the movable plate moves down when button is slid downwards and returns to the initial position when the button is released, and such that when the press plate and the button are pressed and slid downwards at the same time, the movable shaft is pushed forward pivoting the insertion plate around the rotating shaft and uncovers the water outlet.