{HEAD ~ a plurality} of second gripping members which are associated with the bottom portion and protrude from {TAIL ~ the interior surface} thereof 
{ HEAD ~ a plurality } of second gripping members which are associated with the bottom portion and protrude from { TAIL ~ the interior surface } thereof
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH