https://scientific-programs.sc....ience/wiki/Seven_Rea
Tunnel Shipping Containers These are brand new (one-trip) shipping containers with double cargo doors on each side. This allows for easier loading and unloading. It's also a great option for those looking to build something that has two entry points, like tunnels or bridges. These shipping containers are also fitted with fork pockets that are suitable for industrial forklifts of large size and at least two air vents to ensure good air flow throughout. Easy to load/unload The tunnel container