USPS suffers from exceptionally poor leadership. When tasked to improve the USPS finances his response was to reduce service and increase price. I've always been pleased with USPS personnel, the leadership and politics about the USPS is a different story.We even get a knock on the door when they deliver and the last delivery the driver waited until we answered the door. I trust them more than USPS.
I order a lot from Defender. Typically the liquids are shipped with the caps secured, bagged, and in a box with shredded cardboard. The boxes contain less than a gallon of liquid and are clearly marked with "This End Up" labels. These liquids are usually a pint or quart.
As someone mentioned earlier, when a company processes millions of parcels a day some are going to be damaged. Perhaps by accident, perhaps by intention. I wonder how many of us here haven't dropped anything in a while, especially something heavy?
"Honey, that glass just jumped out of my hand. Really! That's my story and I'm sticking to it!"