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40 Ft Tunnel Containers The 40-ft tunnel container also referred to by the name double door high cubicle containers comes with two doors for standard shipping containers at each end. This makes it easier to gain access to the cargo and improves efficiency when loading and unloading. The extra doors allow you to easily convert them into different purposes like storage space or an office space. Durability Shipping containers are designed to stand up to the elements and travel over oceans. They are designed to be sta