A stackable stillage is a type of storage unit designed to be stacked one on top of another to create a single vertical storage solution. They are typically made of metal and have a variety of shelves, compartments, and drawers to store items. Stackable stillages can be used in warehouses, factories, and other commercial and industrial settings to help organize and store items such as tools, parts, and supplies. They are also used in home garages and workshops.