You could at least confirm if a container is indeed empty or not though. I could see that being useful in some weird situations. For example if someone hid something in a container yard, you can at least rule out all the empty ones.
You could at least confirm if a container is indeed empty or not though. I could see that being useful in some weird situations. For example if someone hid something in a container yard, you can at least rule out all the empty ones.