Functionality should focus on secure closure mechanisms, such as hidden magnets, high-quality metal hinges, or ribbon ties. For branding, look for suppliers offering hot foil stamping, UV spotting, or debossing techniques. If you are a wholesaler, ensure the boxes are stackable and pressure-resistant to withstand international shipping. Customized inserts (slots for rings, hooks for necklaces, or holes for earrings) should be tailored to your specific product dimensions to prevent movement and scratching during transit.