Abstract: A container and closure assembly in which the container has a finish portion and the closure is secured to the finish. A circular flexible rubbery sealing liner is located at the top of the container finish and below the cap, and a circular barrier liner that is printable if desired, is provided between the closure top and the flexible liner to reduce the passage of permanents such as O.sub.2 and CO.sub.2 therethrough.

Abstract: Disclosed are unpressurized multiwall containers of liquid having outer and inner walls of unfoamed plastic material. The plastic container has at least two unfoamed plastic walls, each of which is separated from the next wall by a layer containing a gas or vapor wherein the gas or vapor contains less than ten volume percent oxygen gas and is not reactive with oxygen under packaging conditions. The layer or layers containing the gas can be entirely gaseous or be a foamed or cellular plastic containing, for instance, as little as thirty volume percent gas. The containers have a special utility where it is desired to minimize the permeation of oxygen from the ambient air into the inside of the container. In a particularly important embodiment of the disclosure, the outer plastic layer is supported by a paperboard or wooden container, and the inner plastic container is within the paperboard or wooden container.