At least one model is associated with one or more manipulated variables and one or more controlled variables, which are associated with a cascade liquefied natural gas facility. Chamber access region 12A proximate edge 12E of the package, provides entrance into the chamber and access to the stored article. The invention is particularly well suited for deployment in conjunction with beverage dispensing machines and can be configured to shut down the flow of CO2 if a drop in pressure occurs due to a leak in the system or if a syrup delivery system runs out of product. The first zoom lens includes a plurality of electrodes. Thus, it is possible to provide a carbon dioxide separation membrane having excellent selectivity and permeability as well as improved physical strength, chemical stability and temperature resistance.