the retaining wall or panel b these enhancements give it added strength and rigidity along its width fig9 shows the location of the stays 15 and their approximate locations when embedded in the device as installed within a compartment in this fig9 the device has been erased leaving only the stays for their proper location in regards to the compartment fig1 is an enhanced cutaway view of the shelf border that shows the stay 15 embedded in the border of the device shown by the dotted lines in fig1 the panel a is seen with the strip of fig4 seen adjacent to each side this illustrates the relationship of the main panels and the strips for adjusting to accommodate container of varying widths while the flaps on the outer sides are shown as separate they can be sewn or fabricated as a single piece with the main panel fig1 is a bottom view of a first embodiment of the shelf and fig1 is a bottom view of a second embodiment of the shelf where the loop fastener c was secured right to the bottom in fig1 and the associated removable flap was used it is shown extended in fig1 the pvc tarpaulin is extended beyond the existing edge to keep it one piece and fairly wide which creates the adjustability whereas in fig1 loop material was sewn into the border on the bottom side and associated hook material on the removable flap was married to it hook material is now sewn right to the extended pvc material on the bottom side where the entire main panel and sides flaps are made as a.