Istanbul is the largest city in Turkey and one of the most populous cities in the world, with a population of over 15 million. The city is the political, economic, and cultural center of Turkey. Istanbul is one of the most important tourist destinations in the world, hosting over 12 million foreign visitors annually. The city is home to a number of paper sack producers, who provide sacks for a variety of purposes including packaging, shipping, and storage. Paper sacks are an important part of the city's economy, and the producers provide employment for a significant number of Istanbul residents. The paper sack industry in Istanbul is highly competitive, and the producers are always looking for ways to improve their products and services. In recent years, several producers have begun offering custom-printed sacks, which allow customers to add their own logos or other designs. This has become a popular option for businesses and individuals alike, and has helped to increase the popularity of paper sacks as a whole.