Black Friday: Which Shipping Company Is Most Careful With Your Holiday Packages?

Once you wrap your holiday packages for pick-up or drop them off at the post office, you might think that your gift-giving duties for the season are done. But a gift is only as good as the shape it's in when Holiday Packages it arrives.

You may have bundled up your bounty with tender loving care, but there's no telling whether the shipping company will treat your packages with the kindness they deserve.

The tech-savvy editors at Popular Mechanics wondered the same thing. So they worked with a team of engineers to rig up a sensor that can tell when a box is dropped, flipped over, heated or cooled.

Then they sent it on an "epic"