Polystyrene is widely used in packaging due to its lightweight and durable properties. It is commonly found in disposable containers, trays, and cups for food and beverages. The material’s insulating capabilities make it ideal for protective packaging, such as foam inserts for electronics and fragile items. In construction, polystyrene foam is used as insulation for walls, roofs, and foundations, improving energy efficiency. It is also utilized in the manufacturing of consumer goods like toys, appliance housings, and CD cases. Additionally, polystyrene is employed in medical applications, including petri dishes and test tubes, due to its transparency and sterility. Its versatility and cost-effectiveness make it a popular choice across various industries.