Sweaty hands will rub out all the urgent details that you doodled, plus no sheet of paper around! How do you go about this? With the Pen+Sprayer, of course! A neat little pen that features a spray on one end. Spray some of the specialized chemical (that turns into a make-shift writing surface) on the palm of your hand and doodle with the pen-end. The message will stay on the impromptu paper till you pull it off.
The designers have not specified the chemical to be used for the spray; this factor makes me ponder about its feasibility. If things work out, I can totally see this become a runaway hit with teens and the pranks shop!
Designers: He Siqian, Zhang YaKun, Mu Zhiwei, Zhu Ningning, Hui Zhou & Te-Ning Hang