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