When the lid is in the first position it covers substantially all of {HEAD ~ the top opening} of {TAIL ~ the container} 
When the lid is in the first position it covers substantially all of { HEAD ~ the top opening } of { TAIL ~ the container }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL