An inflatable food carrier case formed of flexible plastics material has an outer wall and inner wall to create an inflatable air chamber there between. The puncture needle is adapted to be stuck into the skin along the guide member. A device for inserting at least one message is disclosed. In a two-step CMP process, the first slurry is used in an initial CMP of the aluminum layer, and then the second slurry is used in a subsequent CMP until the upper surface of the underlying silicon layer is exposed. Two possible different arrangements for the printhead are disclosed. The process comprises polymerizing, in the presence of a late transition metal catalyst, a variety of unsaturated monomers which are traditionally, some of which are exclusively, made by free radical polymerizations.