Centon 64GB DSW64GB DataStick Waterproof USB 2.0 Flash Drive for $59.99 shipped.  Here is a screenshot for your reference.  Alternatively, it is available at TigerDirect for $66.99 plus $2.29 shipping for a total of $69.28 shipped.   It is supposedly water proof and shock resistant.  Most places have it for over $145.