Put this one down as perhaps the strangest USB drive ever  designed. While the Flashbag is only a design concept, the  designer is looking for manufacturers to participate on the  project. The drive itself is a standard fare flash drive; the  micro pump is the odd bit.   The micro pump inflates the "bag" around the flash drive in time  with the amount of data stored on the drive. When the drive is  empty it is flat, as you add data it gets fatter. As described  by the designer "When the device is about to blow up you will  see the familiar error message on your screen: «There is not  enough free space»".   With an out of the ordinary product like this, they should use a  more interesting error message. I would suggest "hey stop  putting data in here or I will blow a hole in your pocket". The  device could also bring a world of new insults to geeks  everywhere such as "is that a Flashbag in your pocket, or you  just happy to see me". Does this thing remind anyone else of a  feminine hygiene product?