In Fallout New Vegas, how do I use Mojave Express Drop Boxes?

Question

I've been playing Fallout New Vegas and I spotted the Mojave Express drop box in Goodsprings, but I haven't seen any others. Supposedly you can use these drop boxes to move items from place to place in the Wasteland, but I haven't been able to figure out how.

How do you use Mojave Express Drop Boxes?

Answer 1

Once you've found another dropbox, you can send items from any of them to any other and then pick them up at the destination.

For locations (spoilers), see the Fallout Wiki.