Four corner cake boxes fold flat for easy shipping and storage. An insert limits movement and damage to items inside. The lid can feature a die cut window or printed logo. Side panels have flaps that fold inward for a secure frame. Reinforced corners use triangular tabs that interlock into slots. A locking mechanism at the top secures the contents fully. Pre-scored fold lines support clean bends during assembly. Box height stays 2-3 inches taller than the cake itself. Friction locks on the sides and bottom add durability.