of three different structured elements is shown one or more elements may be used for top cover 4 and bottom cover 5 not shown the three elements shown may vary in physical appearance or physical properties in fig5 an example of a top cover 4 with reduced volume of material is shown one or more perforation 19 openings may be used to further reduce the amount of raw material used for the complete soap bar and subsequent post bathing residual waste aligned staggered off set or irregular rows or random placed arrangement of perforation 19 openings may be used geometric two dimensional shapes such as rectangular round oval star logo or other shapes may be used for the perforation 19 openings in fig6 an extrusion process is shown vat 8 contains a supply of raw soap material which may be liquid or semisolid in state and may also be heated conduit 12 connects vat 8 to pump 9 pump 9 provides the mechanical force necessary to move the raw soap material from vat 8 through conduit 12 through conduit 13 and finally to and through mold 10 mold 10 is constructed with a series of casting elements which create the hollow cell 7 elements not shown of the hollow core 1 the casting elements may be constructed with capability for selectively varying their cross sectional shape as the.