{HEAD ~ The container} is made from two flat panels of heat sealable film, each shaped as a trapezium; or from {TAIL ~ a single web} folded double 
is made from
{ HEAD ~ The container } is made from two flat panels of heat sealable film , each shaped as a trapezium ; or from { TAIL ~ a single web } folded double
HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH