A container bag is a bag-shaped packaging material with handles. It is suitable for transporting and storing powdery raw materials, sand, and fine-grained foods, and it is possible to carry with suspending the handle part. Many products are foldable, including those that self-support in a shape similar to a rectangular parallelepiped, and those that are a mesh type that can be used for draining, washing, and drying the contents. Lightweight and highly durable materials such as polyethylene and polypropylene are often used as materials, and products with excellent water-resistance and weather-resistance are sometimes used as sandbags. It may also be used in combination with optional items such as a cover that covers the container bag from above for waterproof and dust-proof, and a stand that assists with stability when loading contents.