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