Container and sealing lid

The combination of a container having an open top and a lid for sealing said open top comprising:

• a container with a bottom wall and an upwardly extending continuous wall extending therearound
• said container having a sealing bead around the upper peripheral edge of the wall, said sealing bead having an outer surface formed of two curved areas of different radii relative to the center line of the wall with the area of larger radius facing the outside of the wall,
• a lid of the same general overall shape as the upper peripheral edge of the container, said lid having a downwardly extending generally U-shaped sealing channel for mating with the container sealing bead, said lid sealing channel having outer and inner side walls joined by an upper wall each having inner surfaces, the inner surface of the lid sealing channel upper wall between the inner surfaces of the inner and outer walls formed of areas of two different radii with the larger radius area being adjacent the inner surface of the channel outer side wall,
• said container sealing bead and said sealing channel sized so that the sealing occurs on the part of the sealing bead and sealing channel radii of smaller diameter and there is a clearance between all other parts of the sealing bead and sealing channel to aid in fastening the lid to and removing it from the container.