{TAIL ~ A plurality} of {HEAD ~ such containers} can be stacked upon the upper side of the geometrically indexing support structure, and can be extended both horizontally and vertically to construct a generally pyramidally shaped structure extending to a substantial vertical height 
{ TAIL ~ A plurality } of { HEAD ~ such containers } can be stacked upon the upper side of the geometrically indexing support structure , and can be extended both horizontally and vertically to construct a generally pyramidally shaped structure extending to a substantial vertical height
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH