Warehouse cages hold a fixed volume, stack neatly, stay visible at a glance, and ease stocktaking, raising storage space utilization. Sturdy, convenient to ship, and reusable, they cut labor and packaging costs for warehousing companies. They work on factory floors, in supermarket displays and storage, and outdoors. Upgraded cages go onto racking and conveyor lines and can be stacked; wheeled units move easily around the workshop; adding PVC or steel panels stops small parts from falling out. There are three common warehouse cage types: the wheeled cage for turnover; the legged cage, which can be stacked and placed on racks; and the combined wheel-and-leg cage, which covers both uses.