QR codes and RFID tags aren't uncommon when it comes to automated payment applications, and now Colorado-based ShelfX has purposed them for its new wireless-equipped Vending Fridges. Eliminating the need for a cashier -- or cash, for that matter -- each unit allows you to purchase any items packed inside by scanning a QR code with your phone (using the company's app) or an RFID badge. Upon presenting either method to the machine, it's able to tell who you
