Proex specializes in rigid packages made from polystyrene and polypropylene extruded in our facility. Our proprietary blends of HIPS and PP resins are formulated to meet the needs of the customers and markets we serve. Choose from the categories to the left or select "Item Number" to find a specific product. Most products can be made from a variety of barrier materials providing oxygen and moisture resistance for modified atmosphere (MAP) or customized for a specific application.