Atmosphere control members (ACMs) are used in various ways. In one aspect, at least one of the atmospheres in contact with the ACM is cause to flow over the surface of the ACM. In another aspect, the ACM is an internal ACM which does not form part of the exterior surface of a container. In another aspect, the ACM forms part of a reusable module. In another aspect, a plurality of sealed containers, each including an ACM, are stored in an outer container also including an ACM. FIGS. 3-5 illustrate a shipping container (11) comprising an internal ACM (3) having one surface which is exposed to the packaging atmosphere within the shipping container and an opposite surface which is part of a closed chamber (2) to which gases can be supplied in a controlled fashion.