Briefcase

📦 How to Make a Briefcase from Upcycled Cardboard – Functional & Elegant Stationery Organizer Turn discarded cardboard into a sleek, functional briefcase that doubles as a portable stationery box. In this tutorial, I’ll show you how to make an elegant organizer that opens like a briefcase and stores your pens, notebooks, cards, and accessories—perfect for creators, students, or as a handmade gift. 🧰 Built entirely from recycled cardboard, this design uses precise cutting techniques, custom compartments, and an elastic strap system to keep everything tidy and secure.