In an embodiment, a transportable container may include a container portion with an opening into an interior space; a lid for closing the opening; a handle for carrying the container; and a pivotable side latch, pivotally connected to the lid, moveable between a retaining position and a storage position. The pivotable side latch may be configured to engage a retaining structure of another container when the pivotable side latch is in the retaining position. The pivotable side latch may be configured to be in a depression of the lid when the pivotable side latch is in the storage position. With the container in an upright position, the pivotable side latch may automatically move toward the depression when the pivotable side latch is released from the retaining position. The container portion may include a retaining structure with an upward-projecting lip configured to engage a pivotable side latch of a further container.