Stackable cover for container

Abstract

A stackable cover for a container includes a central portion, a peripheral portion, at two recesses, and an opening. The peripheral portion is formed on a peripheral of the central portion. Each of the recess is formed on a top surface of the central portion with a corresponding protruding part formed on a bottom surface of the central portion. At least one protrusion is formed on a side wall of the recess. The opening is formed on a side edge of the peripheral portion and the central portion. The bottom surface of a stackable cover matches the top surface of another stackable cover, wherein the protruding part of the former stackable cover is engaged into the recess of the later the stackable cover, two or more stackable are capable of being stacked and conveniently stored.

1 . A stackable cover, comprising:
 a central portion;   a peripheral portion, formed around the central portion;   two recesses, wherein each of the recess is formed on a top surface of the central portion, a corresponding protruding part is formed on a bottom surface of the central portion, and at least one protrusion is formed on a side wall of each of the recesses; and   an opening, formed on a peripheral edge of the central portion and cutting off the peripheral portion.   
   
   
       2 . The stackable cover as claimed in  claim 1 , wherein the central portion is a concave plane structure having a bottom plane and an annular side wall, and the annular side wall is extended and formed on an edge of the bottom plane. 
   
   
       3 . The stackable cover as claimed in  claim 2 , wherein the peripheral portion is extended and formed on a top end of the annular side wall of the concave plane structure. 
   
   
       4 . The stackable cover as claimed in  claim 1 , wherein the protrusion is a rib. 
   
   
       5 . The stackable cover as claimed in  claim 1 , wherein the protrusion is a bump. 
   
   
       6 . The stackable cover as claimed in  claim 3 , wherein an included angle is formed between the side wall of the concave plane structure and the peripheral portion. 
   
   
       7 . The stackable cover as claimed in  claim 6 , wherein the included angle is a right angle. 
   
   
       8 . The stackable cover as claimed in  claim 1 , wherein an outer edge of the peripheral portion folded downward. 
   
   
       9 . The stackable cover as claimed in  claim 1 , wherein the stackable cover is formed monolithically.