An auto-feed assembly (102) for selectively transporting containers to a marking apparatus (100) is provided. The marking apparatus (100) includes a marking device for selectively applying a mark to a container (103). The auto-feed assembly includes a staging assembly (104) for processing a plurality of containers and a singulator assembly (112) in communication with the staging assembly (104) for isolating at least one container (103) from the plurality of containers. The auto-feed assembly (102) further includes a shuttle (210) disposed between the singulator assembly (112) and a portion of the marking apparatus (100), wherein the shuttle (210) is adapted for transporting the at least one container (103) to the portion of the marking apparatus (100).