The stackable containers are used for the in-company logistics of the bulk material. They are primarily used in the plastics processing industry for intermediate storage or as a buffer between the silos and the converting machines. The containers can be moved either by a stacker crane, an elevating truck or a tower crane. For this purpose they are ruggedly built, although they are still very lightweight because of the aluminium construction. Furthermore the containers can be stacked in a space-saving way, at most two containers on top of each other.