Reusable sealed plastic cover

In the combination of a container having a top with an edge defining an opening in the top and a molded plastic closure arrangement comprising a body part and a closure part joined to the body part by a unitary thin section forming a score line along which the plastic is tearable with relative ease, said body part having annular wall means extending through said opening and in annular contact with said edge, said edge pressing said wall means inwardly to provide a sealing contact therebetween, said wall means defining a first annular wall having a top and a bottom, said removable portion including a second annular wall in juxtaposition to said first and also having a top and a bottom, said score line being between said walls, the improvement comprising:

• said score line being adjacent the top of the first wall and adjacent the bottom of the second wall whereby there is a portion of the first wall below the score line and a portion of the second wall above the score line;
• said annular contact being approximately opposite a bottom part of said first annular wall whereby the pressing of said edge displaces said bottom part inwardly after the closure arrangement is joined to the container from the position of said bottom part prior to said joinder;
• and
• said second wall including means at substantially the same height as the thin section defining a lip integral with the thin section and extending outwardly farther than the bottom of the first annular wall when said closure arrangement and container are joined;
• whereby after the plastic at the score line is torn and the closure part is inserted into the body part with the said walls in juxtaposition, said lip projects outwardly below said first wall to releasably lock the closure part to the body part.