The invention relates to a system for coating at least a portion of an interior wall surface of a container, comprising:(a) a container comprising an open end, a second end opposite the open end, and a wall extending therebetween, the wall having an exterior wall surface and an interior wall surface, the container having a chamber within an area defined by the interior wall surface between the open end and the second end of the container；(b) a monomer gas supply source for supplying at least one monomer gas；(c) a gas inlet duct positioned at the open end of the container and having a portion extending into a portion of the chamber for supplying at least one monomer gas received from the monomer gas supply source into the chamber；(d) a photolysis energy source for providing photons to at least a portion of the monomer gas supplied to the chamber of the container to form a reactive gas comprising at least one reactive moiety from the monomer gas； and(e) an outlet duct positioned at the open end of the container or the second end of the container for removing excess reactive gas from the chamber.
