A solid state hard drive in the familiar form of a flask.
Even though cloud-based solutions promise to be the future of data storage, there will still be a niche for portable memory devices. The data you choose to keep offline will be that much more personal and ultimately what you hold closest to you. The soft contours and body-hugging form of a flask seem appropriate to communicate such a vessel's intimate potential.
Currently seeking an adventurous manufacturer to bring this to market :)