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