Lexar's super-fast 128GB USB 3 JumpDrive is $37 today
This is one of the fastest thumb drives rated by Wirecutter and it is the one I personally use while on the go. It has incredible write and read speeds and is one of the few to actually make use of USB 3's super-fast transfer speeds.
Today, it is $37 on Amazon.
Lexar JumpDrive P20
On good recommendation, I bought a Lexar JumpDrive P20 for easier file transport and other emergency use. This thing is fast. It is, by all accounts and measurements, the fastest USB 3 jump drive I have ever used. I just made a 17GB file transfer of various files and directories in 1 minute from my computer to this drive. That's incredible.
If you want one, these P20 drives come in 3 sizes: 32GB, 64GB, and 128GB which you see here.