Container with a sealing cover

Abstract

A container assembly includes a container having an open top formed in an upper section of the container. The upper section of the container includes an inner peripheral surface, an outer peripheral surface and a flange formed between the inner and the outer peripheral surfaces. The open top is defined by the inner peripheral surface. A cover made by flexible material includes a skirt which includes a first lip, a second lip and a valley formed between the first and second lips. When the cover is mounted to the open top of the container, the flange of the container is engaged with the valley, the first lip is fully in contact with the inner peripheral surface, and the second lip is fully in contact with the outer peripheral surface so as to form an air-tight status. By lifting the second lip, the cover is easily removed from the container.

What is claimed is: 
     
         1 . A container assembly comprising:
 a container having an open top formed in an upper section of the container, the upper section of the container including an inner peripheral surface, an outer peripheral surface and a flange formed between the inner peripheral surface and the outer peripheral surface, the open top being defined by the inner peripheral surface, and   a cover made by flexible material and having a skirt that extends downward from a top surface of the cover, the skirt including a first lip, a second lip and a valley formed between the first and second lips, when the cover is mounted to the open top of the container, the flange of the container is engaged with the valley, the first lip being fully in contact with the inner peripheral surface, the second lip being fully in contact with the outer peripheral surface.   
     
     
         2 . The container assembly as claimed in  claim 1 , wherein the outer peripheral surface includes a first groove and a second groove, the skirt of the cover includes a first protrusion and a second protrusion, the first protrusion is engaged with the first groove, the second protrusion is engaged with the second groove. 
     
     
         3 . The container assembly as claimed in  claim 2 , wherein the outer peripheral surface includes a ridge that is located between the first groove and the second groove, the second lip includes a third groove that is located between the first protrusion and the second protrusion, the ridge is engaged with the third groove. 
     
     
         4 . The container assembly as claimed in  claim 1 , wherein the cover includes a hole defined therethrough, a valve is engaged with the hole and includes an entrance and a slit, the entrance is located within the hole and opens toward an interior of the container, the slit is exposed to outside of the cover so that outside air of the container cannot enters into the container via the slit, when the cover is mounted to the open top of the container, air in the container enters into the valve from the entrance, and expands the slit outwardly so that the air in the container is released through the slit in one way. 
     
     
         5 . The container assembly as claimed in  claim 4 , wherein the hole is located at a center of the cover, the hole is located between two recesses defined in the top surface of the cover.