s bergan stack – N – Stor Unit (9 gallons) can handle all your storing and organizing needs; Multi-use stackable storage containers that store and organize all materials used for pets; Attractively designed for the home; Dri-Stak – N – Stor 40 is the The smallest of our three size offerings with a capacity of 9 gallons of dry food; This product includes one storage unit | Other sizes sold separately | All Size Combinations stack with each other; Bergan products are designed to help you enjoy an active lifestyle with your pet