Polystyrene is widely used in packaging due to its lightweight and durable nature. It is commonly found in disposable containers, trays, and cups, providing insulation and protection for food and beverages. In the electronics industry, it serves as a protective material for packaging sensitive components. Additionally, polystyrene is utilized in the construction sector for insulation boards, enhancing energy efficiency in buildings. It is also employed in the manufacturing of consumer goods, such as toys, appliances, and household items, due to its moldability and cost-effectiveness. In medical applications, it is used for Petri dishes, test tubes, and other laboratory equipment, offering sterility and clarity for observation.