Functional corrugated cardboard boxes are designed to serve a specific purpose or function beyond simply packaging and protecting a product during shipping and handling. These boxes may have additional features, such as handles, perforations, or windows, that make them more convenient or practical for certain applications. Functional corrugated cardboard boxes can be used for a variety of purposes, such as carrying or displaying products, organizing items, or providing additional protection during storage. They are often custom-designed to meet the specific needs of the end-user or application.