A container is a physical unit that holds assets. Assets are assigned to a container during "Unpack" and can be de-assigned during "Disposition".
Containers have a type (e.g. Trolley), a home location (the designated return center location), a and a current location (e.g. a vendor location).
Containers can be identified with a License Plate.
Containers have tag that indicates its usage: Empty, In use of Full.