Seattle — Amazon.com says it has delivered its first order via drone to a real customer in the U.K. as part of a testing program that could ultimately transform the field of logistics.

The announcement comes three years after CEO Jeff Bezos first unveiled that Amazon was working on dispatching items through the air via flying robots. Bezos himself tweeted the announcement early on Wednesday, saying that the first Amazon Prime Air customer delivery was “in the books. 13 min� click to delivery.”

According to a video describing the event, the delivery took place on Dec. 7.

The video shows a drone gingerly carrying an Amazon Fire TV and a bag of popcorn over idyllic fields around Cambridge, England, to a customer’s yard.

So far there are two customers involved in the trial, but in months Amazon expects to enroll dozens more and eventually intends to expand to hundreds of shoppers. Customers enrolled in the trial get the under-30-minute drone treatment free.

Of course, there are limits: Customers can order packages of up to five pounds only, and weather is a factor.

This new step toward widespread drone delivery is important for Amazon, which seeks not only to give its customers the same immediate gratification they get for shopping at brick-and-mortar stores, but also to lower the cost of doing so.