Samsung MUF-64BA/AM 64GB USB 3.0 Flash Drive for $14.99 after promo code ESCENGE45. Shipping is $0.99 for a total of $15.98 shipped. Here is a screenshot for reference. It has metal casing for durability and a compact body.  It is water proof, shock proof, magnet proof, temp proof, and x-ray proof with a 5-year warranty.