{TAIL ~ A breakable membrane}, such as {HEAD ~ a piercable foil}, extends within the container and separates the two chambers 
{ TAIL ~ A breakable membrane } , such as { HEAD ~ a piercable foil } , extends within the container and separates the two chambers
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