A system comprising: a plurality of containers for holding a fluent material, wherein said system further comprises a plurality of vehicles for said containers, wherein each of the containers of said plurality of containers is disposed on a respective vehicle to form a container-loaded vehicles; a track system comprising a track on which container-loaded vehicles are propellable, said track comprising: a primary transport portion that defines a primary path comprised of track that forms a closed loop that is configured to permit at least one container-loaded vehicle to travel in a holding pattern, wherein a holding pattern means that said container-loaded vehicle travels past at least one point on a closed loop twice while traveling in the same direction without an intervening trip in the opposite direction past said point, and that the container-loaded vehicle does not unload a container in between passing through the point twice; at least two secondary transport portions that extend from the primary transport portion and define secondary paths comprised of track that intersects the primary path at ingress locations and egress locations; and at least one unit operation station (84, 86, 88, 90) disposed along each one of said at least two secondary transport portions and configured to perform a container treatment operation on at least one container-loaded vehicle, wherein the plurality of container-loaded vehicles are independently routable along the track system to deliver at least some of the containers to the at least one unit operation station (84, 86, 88, 90) for performing a container treatment operation on at least some of said containers. a plurality of containers for holding a fluent material, wherein said system further comprises a plurality of vehicles for said containers, wherein each of the containers of said plurality of containers is disposed on a respective vehicle to form a container-loaded vehicles; a track system comprising a track on which container-loaded vehicles are propellable, said track comprising: a primary transport portion that defines a primary path comprised of track that forms a closed loop that is configured to permit at least one container-loaded vehicle to travel in a holding pattern, wherein a holding pattern means that said container-loaded vehicle travels past at least one point on a closed loop twice while traveling in the same direction without an intervening trip in the opposite direction past said point, and that the container-loaded vehicle does not unload a container in between passing through the point twice; at least two secondary transport portions that extend from the primary transport portion and define secondary paths comprised of track that intersects the primary path at ingress locations and egress locations; and a primary transport portion that defines a primary path comprised of track that forms a closed loop that is configured to permit at least one container-loaded vehicle to travel in a holding pattern, wherein a holding pattern means that said container-loaded vehicle travels past at least one point on a closed loop twice while traveling in the same direction without an intervening trip in the opposite direction past said point, and that the container-loaded vehicle does not unload a container in between passing through the point twice; at least two secondary transport portions that extend from the primary transport portion and define secondary paths comprised of track that intersects the primary path at ingress locations and egress locations; and at least one unit operation station (84, 86, 88, 90) disposed along each one of said at least two secondary transport portions and configured to perform a container treatment operation on at least one container-loaded vehicle, wherein the plurality of container-loaded vehicles are independently routable along the track system to deliver at least some of the containers to the at least one unit operation station (84, 86, 88, 90) for performing a container treatment operation on at least some of said containers.