The Capsa 2in1® E-Flat model is a reusable corrugated cardboard case, easy to assemble, and delivered flat, ideal for shipping mobile phones or other flat and delicate products. It is specially designed for clients with repair centers that need to make multiple shipments, offering a temporary and secure closure in internal logistics, as well as an tamper-proof shipment to the end user using double-sided tape. The innovation focuses on two key aspects: On one hand, it incorporates a tab with a slot at the top that allows for a temporary closure of the case before and/or after shipping. This system facilitates the reuse of the case within internal logistics and prevents it from being left open during handling or storage. On the other hand, its central opening creates protective walls on all four sides, providing greater security for the device and preventing unexpected drops when opening the case. Additionally, thanks to its folding system, air chambers are generated on the more delicate sides for added protection. Capsa 2in1® E-Flat: an efficient, functional, and reusable case, ideal for mobile phones and other fragile products.