A container includes a base, a lid, and a hinge that connects the base and lid. The containers may be configured to be vertically stackable in an closed position and still permit venting via vents in the lid of each container. The containers may also be nested in an open position with indentations in the base to facilitate separation of the containers. The indentations may be in one of two positions with an alternating pattern when the containers are in the nested arrangement.

A tray includes a base having an upper support surface and a central portion extending downward to define a lowermost surface of the tray. The base includes a peripheral portion recessed relative to the central portion. A pair of opposed first walls extend along opposed first edges of the base. A pair of opposed second walls extending along opposed second edges of the base.

A nestable paint container having a main body can having a can bottom, the can is used for receiving paint, the paint body having tapering sidewalls; a circumferential paint can cover and grooved against an uppermost region beneath a rim of an upper side of the main body can; a small central can cover cap about an open small circular opening in the can cover; a substantially circular spline gripping element; and a drip spout.

A nestable beverage crate includes a base, side walls and end walls. Each side wall includes a plurality of side columns connecting a side upper band to the base. Each end wall includes a plurality of end columns connected an end upper band to the base. The side upper band and the end upper bands each have a plurality of peaks and valleys and are asymmetric, such that adjacent crates will have peaks aligned with valleys and vice-versa. For purposes of preventing shingling, the effective height of these two adjacent side walls is the full distance between the upper edge of the peak and the lower edge of the valley, but the nesting height of the crate is only the height of the upper bands.

A nestable paint container having a main body can having a used true can bottom, the can for receiving paint, the paint body having tapering sidewalls having an outwardly tapering can about the top to bottom of the main body can; a circumferential paint high can cover and grooved against an uppermost region beneath a rim of an upper side of the main body can; a small central can cover cap about an open small circular center over the top of the small central can cap; a spline gripping element substantially circular the cover but outwardly of the can cover and inwardly of the can of the rim; and a drip spout of the inside of the lower of the small central open cap and with a spline gripping element.

A nestable and stackable straight wall tote with an expandable bottom is provided. The tote includes a bottom wall connected to each of a first end wall, a second end wall, a first side wall and a second side wall by an expandable and collapsible linking portion. The expandable and collapsible linking portions allows for expanding the bottom portion of the tote outward to enable the tote to either stack on a like tote when expanded or nest with a like tote (when collapsed. The tote can include a lock mechanism in the bottom to keep the walls in an expanded position.

A disposable or reusable food base tray and plurality of container modules is disclosed which allows the user to both hold food directly in compartments on the base tray and configure a plurality of similar or different food and beverage container modules selected by the user to securely fit the compartments on the surface of the base tray. Container modules include but are not limited to bowls, compartmented container modules, cups including standard cup sizes, different size cup holders, platters and other container modules. The food base tray provides a way for users to add a greater variety of foods to the tray while keeping foods separate, to adapt the tray for a plurality of non-solid foods such as soups and beverages and to easily carry all food container modules securely. An additional feature includes the use of stacking container modules that allow stacking of an additional tray securely on top of said stacking container modules. An additional feature includes unique identifiers on base trays and container modules so that users can readily identify which items belong to the user. An additional feature is themed identifiers to make it easier to remember multiple container identifiers. An additional feature is educational or entertaining depictions and text on the base tray and container modules.

A stackable and nestable container having a bottom, opposed first and second end walls and opposed first and second side walls extending upwardly from the bottom and collectively defining an open top. First and second bales are mounted on and extend between the first and second side walls for movement between a stacking position extending into the open top of the container and a nesting position resting on a top edge of the first end wall. First and second bale-receiving channels are formed in the bottom of the container and extend between the first and second side walls directly below the stacking position of the first and second bales and are sized and shaped to receive the first and second bales of a like container when in the stacking position to define a stack of containers.

Stackable and/or nestable box having a bottom wall and a side wall which rises from the bottom wall and which is defined by side panels, a front panel and a rear panel. The side panels include at least one recessed portion which is recessing from the containment volume and at least one portion protruding towards the containment volume. The box is configured to be nested within another box and to be stacked with other boxes or other containers with dimensions compatible with, or close to, the dimensions of box.

An interferometer apparatus comprises an adjustable birefringent device configured to receive an input radiation and produce corresponding replicas having reciprocally orthogonal polarizations and delayed from each other by an adjustable time delay. The birefringent device also introduces an additional time delay between the replicas. The interferometer apparatus also comprises a compensation optical device optically coupled to the adjustable birefringent device and configured to have a respective structural thickness and respective ordinary and extraordinary refractive indexes to introduce a compensation time delay between the replicas having a sign opposite to a sign of the additional time delay.