Then, a pouring aperture, of lesser diameter than {TAIL ~ the opening} in {HEAD ~ the paperboard}, is cut through the parallel barrier layers which are on the external and the internal surface of the blank 
Then , a pouring aperture , of lesser diameter than { TAIL ~ the opening } in { HEAD ~ the paperboard } , is cut through the parallel barrier layers which are on the external and the internal surface of the blank
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH 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