Patent ID: 7350789

Claim:
In a plastic storage container including a base panel for enclosing the bottom portion of said container, said base panel including an upper surface, a lower surface and a perimeter, an integrally formed side wall extending upwardly from said upper surface of said base panel perimeter defining said container, the improvement comprising: said side wall tapering outwardly as it extends upwardly and sized to fit within another like constructed container in a nested arrangement, said lower surface of said base panel including a plurality of integrally formed sockets each constructed and arranged to accept and retain a spherical roller so that said spherical roller is free to rotate and protrudes below said bottom surface of said base panel, each said socket including a cup portion and a flange portion, wherein said flange portion extends around the perimeter of said spherical roller, said flange including an inner surface and an outer surface; whereby a plurality of like constructed containers may be stored or shipped in a nested arrangement with said spherical rollers assembled to said containers and whereby said storage container may be rolled in any direction along a substantially smooth surface on said plurality of spherical roller assemblies.