Expanded polystyrene (EPS) is a lightweight, rigid foam material made from polystyrene beads. These beads are heated and expanded, creating a structure filled with air, which gives EPS its excellent insulation properties. It is commonly used in packaging, construction, and food service applications due to its durability and resistance to moisture. EPS is often recognized for its role in protecting fragile items during shipping and for insulating buildings. It is recyclable and can be reused in various applications, making it an environmentally friendly option when managed properly. Its versatility makes it a popular choice in many industries, including construction and packaging.