I think a flash drive ought to be carried on a keychain. It should be stylish too. Ideally, it should make you smile. I found one that fits the bill: Bone Collection's USB Drive.
One reviewer, who lost the penguin USB drive that had been given to him as a present, shares his thoughts about his penguin USB thumb drive.:
I had to get another one. Not only is it adorable, but its pretty small and has a lot of storage. Its the perfect flash drive to keep on your keychain.This penguin flash drive is stylish, yet practical.
Where to buy? Penguinity Store carries it.