This 20ft container is technic-based and thus much more resilient to being dropped from large heights than the brick based containers.
There is no floor, which saves weight and makes the container easier to repair should it break. (See all my Model Team container transport models under the tag [https://brickhub.org/i/tags.php?tag=container](container).)
For Studio 2.0, these parts should be saved in C:\Program Files\Studio 2.0\ldraw\Custom Parts\Parts on Windows and Applications/Studio 2.0/ldraw/Custom Parts/Parts on MAC. See this video for a guide of how to set it up in Studio 2.0 and use their rendering engine.
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