An assembly system for wrapping an outer wrapper to an inner sleeve to form an outer wall of a double-wall container can include a suction arm. The suction arm can be configured to couple to a suction source and can have a portion defining a suction surface. At least one suction opening can be provided within the suction surface and fluidly coupled to the suction source. A sealing edge can circumscribe at least a portion of the suction surface.