To make it difficult for an agent to remain in the inner surface of a vessel after sterilizing the vessel using the agent, such as one composed of hydrogen peroxide or peracetic acetic acid, in a aseptic filling/packaging system for liquid beverages, foods, medicines, or the like.

The vessel A used for aseptic filling/packaging is made of a polyethylane terephthalate resin or a polystyrene resin. An inorganic compound deposit film 2, which is of a silicon oxide deposition film or the like made by a chemical vapor deposition method and prevents the absorption of the antimicrobial agent mainly composed of hydrogen peroxide and peracetic acetic acid, is formed as the inner most layer of the resin of the vessel.