although this is just a concept it is a fucking genius idea! the g.p. stamp is a small stamp-sized electronic chip with a built-in battery that keeps track of your shipments. all critical information is sent wirelessly in real time. the slim stamp uses advanced printed electronics - it has a layer of flexible 0.2 millimetre thick gps circuit board on one side and the other is a flexible 0.4 millimetre thick battery cell. you can get larger stamps with more batter life for longer shipment transits. designed by ho-tzu cheng.