Abstract: A container top having an integral cover, for example, an integral dust cover, is provided. The container top includes a cap having a cylindrical skirt with a top, a bottom, a first outside diameter at the top of the skirt, a second outside diameter at the bottom of the skirt, and an inside surface adapted to engage a container; and a ring mounted to the top of the cylindrical skirt, the ring having an opening; and a cover removably mounted to the cap and occluding the opening in the ring. The container top may include a septum positioned in the opening, for example, a septum that can be pierced with a syringe. The container cap may be used in a wide range of industries, for example, the medical, pharmaceutical, the general scientific community, or in any industry where liquid or gaseous samples are handled.

Abstract: A method of cleaning a hollow article comprises a step of introducing an oxidizing working gas into at least an interior portion of the hollow article, while a sub-atmospheric pressure is being maintained therein. Then, an electric field is applied, so as to convert the oxidizing working gas within at least the interior portion of the article into a low temperature plasma. This leads to oxidizing substances situated at least within the interior portion of the hollow article.