Polystyrene is widely used in packaging due to its lightweight and protective properties. It is commonly found in disposable containers, trays, and cups for food and beverages. The material is also utilized in the production of insulation for buildings, providing energy efficiency by reducing heat transfer. In the electronics industry, it serves as a protective casing for appliances and devices. Additionally, polystyrene is employed in crafting and modeling, often in the form of foam sheets or blocks, due to its ease of cutting and shaping. Its versatility and cost-effectiveness make it a popular choice across various industries.