Buy Virgin Plastic Granules, PP T30s, Virgin Polypropylene PP Co Polypropylene PP Film Grade, Injection Molding Grade, Pipe Grade, Yarn Exploring the Benefits of Polypropylene Plastics in the Auto Industry What is Polypropylene: Properties, Benefits, and Key Uses. This durable translucent container box is used for transporting goods. It folds compactly when not in use and does not slip when stacked. It has an opening window on the side so you can access your items from the side. It is an environmentally friendly storage item made with over 30% recycled polypropylene. User Guide (PDF: 1. 64MB)