Patent ID: 8800809

Claim:
A canister comprising a body portion comprising an end wall and a side wall, wherein there is extending from the side wall an upper edge portion thereof, and a cap securable to the body portion comprising a top wall with an inner surface and an outer surface and a cylindrical outer wall secured to the top wall comprising a cylindrical inner surface and an outer portion, wherein a plurality of elongated rib-like supporting elements are secured to the inner surface of the top wall which extend from near a first location on the cylindrical inner surface of the cylindrical outer wall to a second location also near the cylindrical inner surface of the cylindrical outer wall, thereby forming two discrete ends of the support element and also forming a gap between the cylindrical inner surface of the cylindrical outer wall of the cap and each end of the support elements, whereby at least a portion of the upper edge portion of the side wall of the body portion is secured within the gap between the cylindrical inner surface of the cylindrical outer wall of the cap and each end of the support elements forming a fit when the cap is secured onto the body portion of the canister, the ends of the support elements exerting horizontal pressure on an cylindrical inner surface of the upper edge portion of the side wall, whereby the support elements extend substantially perpendicular to the respective portion of the cylindrical inner surface of the cyclindrical outer wall, and wherein one or both of the body portion and cap contains apertures which permit the passage of gases into and out of the canister.