Ensign Porta-stors (hopper storage bins) are a cost-effective method of providing temporary storage of free-flowing and non-free flowing materials. With standard capacities ranging from 20 cu ft to 60 cu ft, Porta-stors offer a space-saving method to hold a reserve capacity of material while also keeping your plant floor clean and organized. Ensign’s heavy-duty construction provides a reusable and stackable robust alternative to traditional Gaylord boxes. Extraordinarily versatile and configurable, we can equip these storage vessels with many options, adapters, and other add-ons to meet your process requirements.