A container is disclosed for storage and dispensing of web roll products such as gift wrap. The larger diameter solder bumps are positioned on a peripheral surface of the interposer and the smaller diameter solder bumps are positioned on a center surface of the interposer. The exterior of the outer webs of the spacer is provided with a plurality of projections in the form of bulges in the wall. In order to achieve a desired selectivity to such dielectric materials, the plasma etch gas chemistry is selected to achieve a desired etch rate of the silicon carbide while etching the dielectric material at a slower rate. Used as the cell culture scaffold is a gel containing asynthetic polymer obtained by polymerization or copolymerization of a monomer having a sulfonic group such as p-styrenesulfonic acid sodium salt and 2-acrylamide-2-methylpropane sulfonic acid sodium salt.