a body for being mounted to said {TAIL ~ container} around said container opening and defining an access aperture for access to {HEAD ~ said container opening} 
a body for being mounted to said { TAIL ~ container } around said container opening and defining an access aperture for access to { HEAD ~ said container opening }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD