Container and lid

Apparatus for sealing a wide mouth container with a lid comprising, in combination:

• a container sidewall, the upper end thereof defining the boundary of said container mouth:
• an outwardly protruding lip at the upper end of said container sidewall and extending around the entire perimeter of the container mouth;
• said lid having a top wall and a lid sidewall secured to and depending downwardly from the periphery of said top wall of said lid, said lid sidewall having a smooth, shoulderless inner surface facing said container sidewall, said lid sidewall comprising:
• a thin, elastic web segment stretchable in a heightwise direction;
• and
• a lower skirt portion formed integrally with and disposed below said web segment, said skirt having a thickness and resistance to heightwise and radial stretching greater than said web segment, said skirt having a lower portion adapted to be forced over said lip of said container;
• said lid being adapted to be snap-fitted over said container mouth by forcing said sidewall over said lip of said container, to expand said skirt radially outwardly, said skirt being adapted to contract radially inwardly toward said container sidewall after passage over said lip to stretch said web segment heightwise and to deform said web segment to cause said web segment to closely conform to the shape of said lip and to wrap sealingly around the outer surface of said lip, said skirt being contracted below the lip to retain said web segment in sealing engagement with said container lip.