A container apparatus having at least one containment member is disclosed that may include a bottom and at least one sidewall, an interior and an open end. The container may also include a flange that extends around a free end of the at least one side wall, and a plurality of wall members (or castellations) connected to/formed with/that extend from the flange. The plurality of wall members may be separated by ventilation apertures, with the plurality of wall members and the ventilation apertures extending around the perimeter of the free end. A sealing material, such as a removable film, may extend over the open end to enclose the containment member.