Patent ID: 8777052

Claim:
A container comprising: a container body having a base and a side wall with a top edge defining a container opening opposite the base, a rim spaced apart from the side wall by a container flange, the container flange extends from below the top edge of the container outwardly of the container body from an exterior wall surface of the container side wall, and the rim projects from the container flange and extends above the top edge of the container side wall, in which the rim and container flange extend around an exterior wall surface of the container to define, with a portion of an exterior wall surface of the container side wall, a substantially U-shaped channel at the top edge of the container side wall, a locking rib which extends around the perimeter of the rim and projects from a free end of the rim above the top edge of the container side wall, and a closure for mounting on the container body, the closure having a top wall and a skirt which extends downwardly from a peripheral edge of the top wall, the skirt including a closure wall and a biasing element for sealing the closure wall against an interior wall surface of the container side wall, and a closure flange which projects from a free end of the closure wall for snap engagement under the locking rib and above the U-shaped channel when the closure is inserted into the container opening, in which the distance between the locking rib and the top edge of the container is greater than a thickness of the free end of the closure flange which locks under the locking rib, and in which at least one sealing rib is provided for engagement with a rib receiving channel, the sealing rib and rib receiving channel are located so that, when engaged, align and center the closure on the container when the closure is mounted on the container.