Dual microUSB/USB OTG sticks may not be brand new anymore, but they're still not nearly as prevalent as more traditional flash drives. Nevertheless, there are plenty of options out there from the big brands and lesser-known folks alike. A year ago, Leef Bridge announced a model with support for USB 3.0. A year later, SanDisk is now doing the same.
The SanDisk Ultra Dual USB Drive 3.0 is a slightly redesigned version of the previous model, only it now handles faster transfer speeds.