Designed by Wang Xuelei, the U Drive Memory Pen, which can be used as an ultimate spy gadget. The tip of this slick ink-less pen actually holds sensors that “read” and store the written text/ sketches into the built-in memory card. All information stored can later be accessed through the USB key, which is located at the other end of the pen. It doesn’t even require external battery and recharges when hooked into the computer. Too bad, it is only a concept so far.