{TAIL ~ The containers} 12 are shown preferably as {HEAD ~ generally rectangular volumes}, but other suitable volumetric shapes may be used 
{ TAIL ~ The containers } 12 are shown preferably as { HEAD ~ generally rectangular volumes } , but other suitable volumetric shapes may be used
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH