Dump&Stor™ Cube Bags are a flexible alternative to rigid plastic storage containers. They are made of water and mildew resistant polypropylene with reinforced steel rods to support the sides and come in three sizes. Unlike rigid plastic storage bins that take up space even when empty, Cube Bags collapse down when not in use and fold away for easy storage. Rigid plastic storage containers also cannot be overstuffed. With Dump and Stor Cube Bags’ flexible design, you can overstuff the unit and the industrial grade zipper top will easily close. Cube Bags are stackable and water resistant. Cube Bags also have a clear window on the front which you can write directly on or insert a 3″x5″ card with a helpful reminder of what’s stored inside.