Well, I'm going to assume that means the same as flash drives, and I'd recommend the same I have: Kingston DataTraveler Ultimate 3.0 G3 (64GB)
It has good design, great durability, no preinstalled software to take space or clutter it up, but it isn't the most durable thing around. This however shouldn't pose an issue in average usage
If you want unparalled durability, you can go with LaCie XtremKey USB 3.0 (32GB), although it can grow a little hot with extended usage