Amazon.com is currently working on a new technology in delivering their customer's order using an unmanned flying machine/vehicle called "Amazon Prime Air" which will deliver customer's orders in just 30 minutes.  The Amazon Prime Air can travel over 50 miles/80 km per hour, and will carry 5 lbs. or 2.3 kg load, which account for 86 percent of the products sold on Amazon. Hope we can see it in operation by 2015. :)