referring now to fig1 - 4 , a preferred embodiment of the present disclosure is shown . bin retaining panel a has a generally flat planar wall 10 which has ends 12 , 14 , 16 , 18 forming a generally rectangular configuration . the bin retaining panel is fabricated from preferably a thin sheet of metal . upper or first end 12 has a bent edge 20 which is bent at about 90 degrees with respect to the planar wall 10 . edge 20 has two half sections 21 , 23 to accommodate and retain the ends of the doors in a closed configuration . edge 20 also helps put pressure on the panel with the door resting on the panel and retain the panel in position . edge 18 also helps apply pressure to the panel from the door resting on top of the panel . sections 21 , 23 each have rounded edges but straight edges are also contemplated by the disclosure . a notch or gap 19 can be formed between walls 21 , 23 to accommodate ends or edges of two doors . edge 20 extends upwardly ( i . e ., out of the page ) as shown in fig1 . side ends 14 , 16 have a bent edge 22 , 24 which are bent downwardly or into the page as shown in fig2 and 3 . edges 22 , 24 are bent at an acute angle with respect to wall 10 of about 45 degrees or so . edges 22 , 24 have a series of tabs or protrusions 26 , 28 which are sized and configured to engage mating slots 138 formed in shelves of a bin . for example , notches 26 , 28 can have a rectangular or square shape but other configurations such as angled or rounded shapes are also contemplated by the disclosure . protrusions 26 , 28 can have a substantially c - shaped or rounded or curved notch 29 formed therein for accommodating a shelf wall . other shapes and configurations of notches or cut - outs are also contemplated by the disclosure . protrusions 26 , 28 engage slots or openings 138 in the shelf wall and help align and maintain the protrusion of the panel . bottom end 18 has a straight edge portion 30 which is not bent with respect to planar wall 20 . edge 30 is shown to have rounded or radiused corners 31 , 33 , but straight corners could be used as well . positioned on the planar wall is a slot or opening 32 which is sized and configured to receive a correspondingly locking member for a door of the shipping container . opening 32 can be placed centrally on panel in various positions on the planar wall as discussed . a plurality of holes 34 can also be formed on the panel for hanging the panel when not in use . referring now to fig5 - 8 , an alternate embodiment of the bin retaining panel b is shown . panel 40 also has a generally flat planar wall 42 which is generally rectangular in configuration . planar wall 42 has ends 44 , 46 , 48 , 50 which form the rectangular conformation . upper and lower ends 44 , 46 each has a bent edge or wall 52 , 54 which is bent upwardly ( extending out of the page in fig6 ) about 90 degrees with respect to wall 42 as shown in fig6 . walls 52 , 54 help retain and position doors on the cabinet in a closed configuration . the walls 52 , 54 also help retain the panel in position and apply pressure to the panel via the door resting on the panel . wall 52 includes two half sections 56 , 58 to accommodate the ends of the doors . a notch or gap 59 can be formed between wall sections 56 , 58 to accommodate the ends of the two doors . as shown in fig8 , wall section 56 , 58 each has curved or rounded edges . however , straight or angled edges are also contemplated . side ends 48 , 50 each has a bent edge 60 , 62 which is bent downwardly or into the page as seen in fig6 and 7 . edges 60 , 62 are bent at an acute angle with respect to wall 42 at about 45 degrees or so . other angles are also contemplated by the disclosure . edges 60 , 62 have a series of tabs or protrusions 64 , 66 ( such as rectangular or square shape or any suitable shape ) which are sized and configured to engage mating slots 138 formed by shelves in the bin . protrusions 64 , 66 can have a c - shaped or rounded or curved slot 69 to accommodate a portion of the shelf . positioned on the planar wall is a slot or opening 72 which is sized and configured to receive a correspondingly locking member for a door of the shipping container . a plurality of holes 73 on planar wall 42 can be used for hanging the panel when not in use . referring now to fig9 , another alternate embodiment of the bin retaining panel assembly is shown . this embodiment has two half panels 80 , 82 each of which has planar walls 84 , 86 and upper and lower ends 88 , 90 , 92 , 94 which have bent edges 96 , 98 , 100 , 102 bent at about 90 degrees with respect to planar walls 84 , 86 . these bent edges help align the doors on the panel and apply pressure to the panel via the doors . a gap is formed between panels 80 , 82 to accommodate the two doors . side ends 104 , 106 each has a bent edge 108 , 110 bent downwardly at about 45 degrees with respect to planar walls 84 , 86 . edges 108 , 110 have a plurality of tabs or protrusions 112 which engage slots 138 formed by shelves of the storage bin for aligning the panel and retaining it in position . tabs 112 can have a substantially rectangular or square shape and can have a round or curved slot or notch 115 formed therein . inner ends 107 , 109 do not have bent edges . each of the planar walls can also have a cut - out or opening 111 , 113 to accommodate a lock member of the bin door . also , the panels 80 , 82 can be configured to be used in a first orientation or a second orientation rotated 180 degrees with respect to the first orientation . referring to fig1 , another alternate embodiment is shown . this embodiment is essentially the same as described for fig9 , but additional bent edges 114 , 116 are formed on ends 118 , 120 of the panels 80 , 82 . each of the bent edges accommodate the door frames of the bin and puts additional pressure on the panel to stay in position by contacting the door frame . a gap is formed between the panels 80 , 82 to accommodate the two doors &# 39 ; edges . referring now to fig1 and 12 , installation of a bin retaining panel b ( shown in fig5 - 8 ) onto a storage bin c is shown . bin c has a plurality of side walls 122 , 124 , 126 , 128 and two hinged doors 130 , 132 which have a locking member assembly 134 . a plurality of shelves 136 are positioned within the bin . bin panel b is lowered onto the end of the bin when the bin is tilted on its side . that is , shelves 136 are positioned vertically in this orientation or at about 90 degrees with respect to the panel b . shelves 136 form a series of slots or openings 138 which matingly receive and engage bent tabs 64 , 66 formed on edges 60 , 62 of the panel . this helps align the panel and retain it in position on the bin . referring to fig1 , the panel b can be flexed or bent sufficiently to engage the tabs 64 , 66 with slots 138 of the shelves . the panel then rests horizontally on or is positioned on outer edges 140 of the shelves 136 . the doors 130 , 132 are then closed wherein the bent edges 54 , 56 , 58 of the panel contact the edges of the doors to help retain the panel in position and allow the doors apply pressure to the panel . the doors are then locked and the locking member is received within opening 72 . the bin is then placed in a storage or shipping container and is shipped . the steps described for fig1 and 12 also apply to the panels shown in fig1 - 4 and fig9 and 10 . when the bin arrives at the user destination , the doors are unlocked and removed , and the panel is removed by pulling on the cut - out or opening 72 on the panel . alternatively , rings or cable retaining members 150 can be formed on each of the planar walls to accommodate cable ties , straps , zip ties , etc . to pull the panel out of engagement with the bin . the exemplary embodiment has been described with reference to a preferred embodiment . obviously , modifications and alterations will occur to others upon the reading and understanding of this specification . the specification is intended to include all such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof .