also materials which involve physiological hazards while product contamination is perhaps of primary concern in connection with the pharmaceutical and food processing industry the reduction in overall plant housekeeping activities as well as reduction in cost of plant equipment is of significance to every industry referring to fig1 the containers which can be utilized in accordance with the present invention can be of almost any shape provided that a least two sides of the container are equipped with a frame having fittings adapted for connection with a docking station as hereinafter described container 10 illustrated in fig1 is a square container which is equipped with any desired number shape and size openings such as opening 11 which will facilitate the transfer of materials to and from the container parallel grooves 13 and 14 are illustrated as recessed transversely extending fittings on at least two of the sides of container 10 and these grooves are designed to interconnect with rails projecting from arms of the docking station illustrated in fig2 as seen in fig3 rails 16 and 17 projecting from arm 20 of the docking station are spaced exactly the same distance apart as parallel grooves 13 and 14 of container 10 accordingly when container 10 is connected with docking station 18 two side walls of container 10 contact arms 20 and 21 of docking station 18 fittings such as grooves 13 and 14 are recessed in order to avoid any protrusions on the outside of container 10 which would interfere with the transportation storage or other utilization of the container in special cases.