Container with Sealing Wall

A sealable container, comprising:

• walls defining interior and exterior surfaces and an interior space, the walls having an upper portion near an upper end of the walls that defines a sealing flange, the sealing flange having an internal edge that defines an opening to the interior space;
• a collar having an interior surface adapted to fit around the container near the upper portion and defining a subcollar space between the exterior surface of the container and the interior surface of the collar;
• a collar-mounted removable lid having an interior surface which, when in a closed position, is adapted to cover and seal the opening, the lid having a sealing wall depending from its interior surface and projecting toward the sealing flange and being dimensioned to remain inward of the sealing flange when in the closed position, the lid further having a substantially domed central section of dimensions less than the sealing wall and joined to the lid by an angled wall tapering from the domed central section down to the interior surface proximate to the sealing wall;
• and
• wherein, upon righting a disoriented container having contents, the angled wall and the sealing wall cooperate to direct the contents packed against the interior surface of the lid down into the interior space of the container to substantially prevent entry into the subcollar space.