of Meta Ray-Ban Smart Glasses proved to be a hit with more than 700,000 pairs soldwhich is inspiring rivals like Apple to it eyes the same space.

Now, Amazon is reportedly also designing smart glasses, but not for customers. Instead, the company opened up a new use case for the technology: faster deliveries.

Related: Mark Zuckerberg does a better job than his rivals at explaining artificial intelligence — and it's helping Meta outpace Alphabet, Amazon and Microsoft

According to one Reuters reports on MondayAmazon is making smart glasses for its drivers that can save time and reduce the overall cost of delivering packages, making it easier to manage the last mile between an order and the buyer's home. Amazon spent $89.5 billion for transportation costs in 2023, up from $83.5 billion a year ago.

The glasses will have an embedded screen that shows the delivery guides step-by-step instructions as they deliver packages to unfamiliar neighborhoods or buildings. It would tell them where to turn after getting off the elevator in real time, for example, without having to carry GPS systems.

Five sources told Reuters about the secret project, which they said could take “years” to develop. Amazon is said to be facing challenges in making smart glasses with a battery that lasts a full eight hours of a shift without being too bulky to carry around.

^{Amazon Echo Frames as of September 2023. Photo: Al Drago/Bloomberg via Getty Images}

The glasses will build on Amazon's existing $299 The Echo Framewhich currently allow customers to make calls, play music and talk to Amazon's Alexa voice assistant.

Each Amazon driver delivers more than 100 packages per eight-hour shift, according to Reuters. Amazon Delivery Service Partner Program Employed 390,000 drivers since September.

Related: Are Apple Smart Glasses in the works? Apple is looking at the Meta's Ray-Ban success story, according to a new report.