A portion of {TAIL ~ the first and second layers} can function as {HEAD ~ a frangible seal} that is configured to be torn away by a user 
A portion of { TAIL ~ the first and second layers } can function as { HEAD ~ a frangible seal } that is configured to be torn away by a user
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH