I spent a few summers working at a distribution center for all the cold and frozen food for every Safeway in the state. Upstairs people put boxes onto conveyor belts, the system sorted them into lanes and downstairs people put the boxes onto "per store" pallets.

At least every 30 minutes someone would pickup a box of yogourt/orange juice/whatever and the bottom would fall out and they would wear the contents.

Boxes are NOT usually designed to be pickup up from above.