Leaflets, posters and other paper-based promotional tools are used extensively, but the effectiveness of these methods is steadily decreasing. On the streets, you can often see posters stuck on walls and leaflets being handed out everywhere. But there aren't many people who actually pay attention to them anymore; instead, leaflets and posters are mostly discarded all over the ground. It would be great if we could make use of them somehow. For instance, shopping bags made from posters, which reuse posters in a good way, is an excellent solution. Even though it's just a bag made from a piece of paper, it can still hold around 33 pounds of weight. However, it's not suitable for carrying smaller items. If leaflets and posters were designed to be more distinctive and had additional practical functions, they probably wouldn't be discarded so carelessly. Compared to now, their promotional effects would likely be better.