The portable cooler has {HEAD ~ a plurality} of {TAIL ~ foldable wheels} on the base thereof to facilitate portability 
of
The portable cooler has { HEAD ~ a plurality } of { TAIL ~ foldable wheels } on the base thereof to facilitate portability
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH