A vending-tote adapted to be moved by a lift-robot across a shelving-unit to rendezvous with a second tote carried by a second robot, the vending-tote comprising: a container designed to contain a plurality of items; and a dispensing mechanism integrated within the container, wherein the dispensing mechanism is configured to be activated by the lift-robot, the second robot, or both for dispensing at least one item of the plurality of items into the second tote.