The cover has a corresponding diametrically extending sealing surface adapted to engage the sealing edge of the partition to form a seal to prevent mixing of the contents of the compartments when {HEAD ~ the cover} is in place on {TAIL ~ the container} 
is on
The cover has a corresponding diametrically extending sealing surface adapted to engage the sealing edge of the partition to form a seal to prevent mixing of the contents of the compartments when { HEAD ~ the cover } is in place on { TAIL ~ the container }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL