One Christmas, we temporarily rented out some warehouse space to UPS.
Inside, they set up a lift just behind the drive-in door. Just behind the lift, they set up a huge conveyor.
They backed the tractor-trailer trailer over the lift and disconnected it from the tractor. The lift raised up and snatched the entire trailer into the air, and started to tilt it backwards. As it tilted, the lift began to vibrate, shaking the packages down onto the conveyor.
I almost puked in disgust. From that day on, I'd suggest never to send ANYTHING through UPS.
Pay a little extra, if you have to, and send USPS Priority or Fedex.