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20ft Tunnel Container These shipping containers are also called tunnel containers. They have doors on both ends which makes it easier to load and unload. They are great for storing heavy machinery and vehicles. One trip (new) containers are great for storage and conversions. They can be used as boiler rooms, garages and even man caves! They can also be divided into two separate units, which are ideal for office and storage spaces. Double-end doors The 20ft Tunnel Container has double-end doors that