Paperboard is printed and sent through devices that cut, glue, and rating it to create a folding carton. Folding cartons are shipped flat and when built, they create a container to protect and/or display products. I’ve acquired custom printed packing containers from them 2 times now. They’re really good quality, https://gablecarton.art.blog/2025/01/09/gabletop-pak-leading-the-way-in-sustainable-packaging-solutions/