US Patent 11752947 Stackable container assembly

A container including a container body and a fixture assembly configured for receiving an accessory container, the bottom surface of the container body being configured for connecting the container to a vehicle, the bottom surface including: a tongue attached to the bottom surface at a first end portion of the bottom surface, the tongue extending from the bottom surface, at least a portion of the tongue extending parallel to the bottom surface, the tongue being positioned on a first side of the container body, and an anchor attached to the bottom surface at a second end portion of the bottom surface opposite the first end portion, the anchor being positioned on a second side of the container body, the second side of the container body being oppositely disposed to the first side of the container body, the anchor including at least one anchor lock.