This thing is like a short cradle with wire between the slats. He intends it for washing vegetables from the garden. I can seriously see how useful it will be for sweet potatoes. They are covered with mud. He'll be able to use the hose to rinse the mud off, then tip it over to dump them out onto something clean.
He put a folded blanket in it to show it tips. It is a clever idea. He also thinks it will be handy for rinsing turnip greens, peas, anything that needs to be rinsed with the hose before going to the sink.