The larger boxes are our wooden fermenters. Before we had them all inside simmering away, they were stacked up outside, waiting to be brought in, sanitized and have grapes stuffed in them. Eventually, we had each and every box going, several of them were even used twice for some of the quicker ferments.
The smaller boxes presented an unusual and frankly, vexing problem. The dumper has little adjustable catches that keep the bin from flipping out and into wherever you're dumping. These were too short for the clips, so several methods of securing them with blocks of wood were found -- all of them sketchy, but some of them successful. We didn't loose any bins in the hopper, but several pieces of wood had to be fished out until the procedure was perfected. What a pain in the keister!