A container for holding product therein during shipment and for reuse has multiple levels of tracks supported by each side of the container. At least one of the tracks on each side may be linear, generally U-shaped and/or L-shaped. Dunnage supports and at least one lockable crossbar assembly travel along corresponding tracks at the same level. At least one lockable crossbar assembly has locking assemblies to fix the position of the lockable crossbar assembly relative to the tracks. Dunnage hangs from at least some of the dunnage supports for supporting products.