Patent ID: 6352171
Filing Date: 2002-03-05
Classification: B65B,B65D

Abstract:
A vessel comprising a container, a top and a flexible spring action hinge linking the container and the top, wherein the container, the top, and the flexible hinge are made of the same molded material, said container having substantially cylindrical side wall and an inner surface of the bottom being concave and further comprising:a filled area in the center of the top, said area extending from an outer surface of the top to an inner surface of the top, the filled area having a size which corresponds to between 10% and 70% of the area of the vessel in transverse section; the filled area comprising a casting, a groove at the edge of the container, forming an inner projection, and an internal recess in the top, wherein said groove and said recess are configured such that said inner projection can snap fit into the recess to maintain a tight closure of the top.