A an intermodal container comprising: a first post; a second post; a third post; a fourth post; a floor drain hole located in one of the posts; an outlet drain hole located in one of the posts; a floor attached to the first, second, third, and fourth posts, the floor comprising: a front floor beam; a first side floor beam; a second side floor beam; a rear floor beam; a floor grating permanently attached to the top surface of at least two of the floor beams; at least one floor plate permanently attached to the bottom sides of the front, first side, second side, and rear floor beams, the beams and at least one floor plate forming a floor container, and the floor drain hole in fluid communication with the floor container, and generally at the same elevation as the interior of the floor container, and the outlet drain hole located at an elevation below the floor drain hole and the floor container, the floor container in fluid communication with the interior of the post with the floor drain hole and also in fluid communication with the interior of the post with the outlet drain hole.