Abstract: A container for manually mixing contents therein includes a base and a lid, and when formed has a first horizontal axis, a second horizontal axis, and a vertical axis that is perpendicular to the horizontal axes. The base defines an elliptic-shaped base opening and a base chamber having two conjugate diameters D1 and D2 proximate the base opening. The lid defines an elliptic-shaped lid opening and a lid chamber having the two conjugate diameters D1 and D2 proximate the lid opening. The diameter D1 extends in a direction of the first horizontal axis and the diameter D2 extends in a direction of the second horizontal axis. A ratio of D1 to D2 is greater than 1. The container also includes grips for manually mixing the contents within the base and lid chambers by rotating the container about the second horizontal axis.

Abstract: A container includes trays having a substantially identical profile. For each tray, the tray includes a rim that includes a proximal segment, a bead segment, and at least one vent channel defined in the proximal segment, the bead segment has an upwardly-extending member and a downwardly-extending member, the upwardly-extending member defines a first cavity, and the downwardly-extending member defines a second cavity. When the trays are engaged to close the container, the upwardly-extending member of the first tray is received in the second cavity of the second tray, the upwardly-extending member of the second tray is received in the second cavity of the first tray, the first and second trays define an interior volume of the container, the proximal segments of the rims of the first and second trays are in face-to-face contact to substantially seal the interior volume, and each vent channel is in communication with the interior volume.

Abstract: A container includes a lid and a base. The lid includes a lid rim and a skirt extending downwardly from the lid rim. The base includes a base rim and a base flange extending outwardly from the base rim. The skirt overlaps the base flange when the container is in a closed configuration, and the skirt includes a sealing ring that engages the base flange to seal the lid to the base in the closed configuration. A plurality of cut-outs are formed in the sealing ring that alleviate concentration of friction between the sealing ring and the base flange when a force is applied to separate the lid from the base.

Abstract: A container includes trays having a substantially identical profile. For each tray, the tray includes a rim that includes a proximal segment, a bead segment, and at least one vent channel defined in the proximal segment, the bead segment has an upwardly-extending member and a downwardly-extending member, the upwardly-extending member defines a first cavity, and the downwardly-extending member defines a second cavity. When the trays are engaged to close the container, the upwardly-extending member of the first tray is received in the second cavity of the second tray, the upwardly-extending member of the second tray is received in the second cavity of the first tray, the first and second trays define an interior volume of the container, the proximal segments of the rims of the first and second trays are in face-to-face contact to substantially seal the interior volume, and each vent channel is in communication with the interior volume.

Abstract: A container includes trays having a substantially identical profile. For each tray, the tray includes a rim that includes a proximal segment and a bead segment, the bead segment includes an upwardly-extending member and a downwardly-extending member, the upwardly-extending member defines a first cavity, and the downwardly-extending member defines a second cavity. When the trays engage to close the container, the upwardly-extending member of a first tray is received in the second cavity of a second tray, and the upwardly-extending member of the second tray is received in the second cavity of the first tray. When the first tray and the second tray are stacked, movement of the second tray relative to the first tray is limited by the upwardly-extending member of the first tray engaging the rim of the second tray, and/or by the downwardly-extending member of the second tray engaging the rim of the first tray.