It looks like there’s been a mix-up with the brand name on the backpacks; however, the concept of using them for advertising, potentially with an added hologram feature, is indeed intriguing and can offer a dynamic way to capture attention in high-traffic areas. Implementing holograms usually involves a portable power source and a holographic display system that can be integrated into the backpack design. The display would need to be lightweight and durable for everyday wear. If you are exploring this kind of tech, you might be working with specialists in portable holographic devices to create a system that's effective for your walking billboards. Have you started looking into the technical aspects of adding holograms to the backpacks?