This transparent USB memory stick covers all the convenient functions of the memory sticks I’ve introduced so far. The light inside the glass represents the data saved in it: No lights means no data, lights filling the glass means there’s no more space. The kind of data is recognized with colors. For example pink is for images, blue is for documents and green for movies, etc. It would be more fun if the lights can move in the glass when you shake it.
Synced with the icon on your desktop of course.