Cargo container

A substantially rectangular receivable cargo container in combination with and selectively cooperatively engageable with the interior and exterior of a substantially rectangular standard cargo container having standard exterior dimensions, a cargo-receiving interior, an access opening at one side thereof and having substantially cubical standard mounting blocks at its exterior corners in fixed predetermined standard spacial relationship with each other and each having three outwardly disposed apertured exterior sides arranged in substantially parallel planes with and spaced outward from related sides of the standard container, said receivable container being smaller in exterior dimension than the interior of said standard container and includes mounting means comprising substantially standard cubical mounting blocks related to the exterior corners of the receivable container and carrier means between said blocks and said container to secure said blocks relative to the receivable container in a first position wherein said blocks are in standard spacial relationship with each other and operable to position said blocks in a second position wherein said blocks are within the dimensional limits of the interior of said standard container, whereby said receivable container can be cooperatively related with the exterior of said standard container and other like adjacent standard containers with their related mounting blocks in cooperative relationship with each other when the mounting blocks of the receivable container are in said first position and said receivable container can be cooperatively received by and positioned within the standard container when said blocks are in said second position.