The tray includes {HEAD ~ a bottom panel} substantially parallel to the bottom wall and {TAIL ~ a side panel} substantially perpendicular to the bottom panel 
substantially parallel to
The tray includes { HEAD ~ a bottom panel } substantially parallel to the bottom wall and { TAIL ~ a side panel } substantially perpendicular to the bottom panel
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH