A contactor including a plunger core, a pull-in winding, a holding winding, a moving contact plate and three contacts. A first polygon having a number of vertices representative of the located points of interest is computed, followed by determining a spatial relation between its vertices and the ROI. At least one inflating valve on the enclosure for inflating the enclosure by an external source of compressed gas; at least one deflating valve on the enclosure for deflating the enclosure by the external source of compressed gas; and at least one exit valve on the enclosure for allowing the compressed gas to escape while deflating the enclosure. The second region is separated from the first region by a first trench. Accordingly, the content played by one device can be played by another device concurrently. A molded plastic container or container preform is provided that includes a wall having at least one layer of matrix resin and at least one layer of barrier resin that is blended with an additive.