Consider a phone app which reads product barcodes and orders more of the same thing.  You shop by pointing your phone at the empty container and telling it how many.  Smarter developers might also have it recognize common fruits and vegetables. That might be useful.<p>I&#x27;m surprised Amazon doesn&#x27;t already have such a device. They have a voice input thing and a push to buy thing.  A kitchen appliance which looks and works like a price gun is a logical next step.