https://consumerist.com/2017/08/21/walmart-imagines-floating-warehouses-that-could-rain-down-delivery-drones/

While Amazon has dreams of delivery drone beehives and parachuting packages, it’s not the only one looking upward: Walmart has plans for a floating warehouse capable of launching flying delivery vehicles so it can rain discount goods on you from the skies.

Walmart filed a patent for a “gas-filled aerial transport and launch system” that sounds a bit like a blimp: it would involve “a carrier compartment where the gas chamber induces a lifting force on the carrier compartment” and at least one propulsion system, as well as a “navigation control system” that controls where the aircraft goes.