When choosing a box packaging supplier, consider factors like product quality, customization options, and durability. Ensure they offer a variety of materials and sizes to meet your specific needs. Check for eco-friendly options if sustainability is important to your brand. Evaluate their reliability and delivery times to ensure your packaging is available when needed. Lastly, review their customer service and support to address any issues promptly and efficiently. For reliable service, consider GCB at gcb.com.my.