If there’s one thing Amazon is good at, it’s finding novel ways to deliver junk you probably don’t need right to your door no matter where you are. Ok, they’re also good at many other things, but delivery, particularly free two-day shipping with Amazon Prime, is a big draw for the retail behemoth. Amazon isn’t just content with regular parcel delivery, though. Amazon has tested drone delivery, is looking into automated delivery vehicles, and even allows Amazon Prime subscribers to grant front-door access for in-home deliveries. Today, Amazon launched a new service which grants couriers access to open people’s vehicles and leave packages inside. Will Amazon shoppers really want total strangers in their cars?

The service has only opened in 37 U.S. cities, including Houston, and is being called Amazon Key In-Car. Amazon Prime members with certain compatible vehicles can allow Amazon to access their vehicle’s OnStar account or Volvo On Call account to unlock their vehicles for delivery to their trunk. These include 2015 or newer Chevrolets, Buicks, GMCs, Cadillacs, or Volvos. Users must have an active account with either OnStar or Volvo On Call. Amazon plans to expand the service to more makes and models in the future.

The service uses a companion app connected to users’ Amazon accounts. The app notifies users where to park within range of delivery locations and provides delivery time estimates and notifications. The app also notifies users whenever their car is unlocked and subsequently relocked, and of course allows users to rate each delivery. The app does not affect normal shipping rates and times, meaning that sweet Prime Two-Day shipping is still free, even to your car.

If you just really need that new smartphone case for your drive home from work in two days, I can see this being useful. Otherwise, what’s the difference between home delivery and car delivery? Whatever the case is, don’t be surprised to see Amazon packages all over Houston parking lots in the coming months.