Corsair Voyager Vega 16GB

This popular model from the experienced flash drive manufacturer Corsair is pretty much perfect if you need a tiny, yet extremely powerful flash disk. Its chromed zinc finish will match your Ultrabook beautifully, which is rare for a flash drive. It is fully compatible with any PC with a USB port and supports even the older USB 2.0 format. However, USB 3.0 is required if you want to take advantage of its blisteringly fast data transfer speeds.
The Corsair Voyager Vega is fully compatible with Windows, OS X, and Linux, and does not require installing any special drivers before use. Its ingenious one-piece design includes an integrated loop, making it easy to carry it around like a keychain.