Have I already mentioned that I love amazon for it? :-)
"Amazon’s drone delivery program stopped being a joke a while ago, but the company still has to overcome serious challenges to make the technology actually work. One of these is getting drones near enough to large populations so they’re more efficient than regular road delivery. Amazon has an idea for that though: Huge. Drone. Beehives."
https://www.theverge.com/2017/6/23/15860668/amazon-drone-delivery-patent-city-centers