Bezos said the drone models Amazon is currently testing have a range of 10 miles and can handle products under five pounds, which is nearly 90% of the company's offerings.
"It won't work for everything," Bezos said. "We're not going to deliver kayaks, or table saws this way."
Amazon has long used innovative delivery strategies to gain an advantage over other retailers. Its warehouses, called fulfillment centers, are famously efficient. The company was also quick to recognize the promise of free shipping on larger purchases, and its Prime service now offers free shipping for a flat annual fee.