When {TAIL ~ the lid} is in the third position substantially all of the top opening of {HEAD ~ the container} is uncovered 
When { TAIL ~ the lid } is in the third position substantially all of the top opening of { HEAD ~ the container } is uncovered
OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH