A group of amino substituted benzoyl derivatives, their preparation and their use. A first valve arrangement alters the direction of gas flow through the heat transfer space, the first valve arrangement having a first condition in which the first region is upstream of the second region and a second condition in which the second region is upstream of the first region. The two endplates are separated by a single spacer that is positioned between the first endplate and the second endplate and maintains a pre-determined distance between the first endplate and the second endplate. The second module may, for example, be a digital module adapted to generate the at least one voltage control signal utilizing digital active components. The flip-top closure base portion includes an integrally molded first hinge structure for connecting the flip-top closure base portion to a flip-top closure top to create the flip-top closure for the container.