and a bottom channel along its bottom edge each channel having an inner and an outer channel wall where the width of two adjacent top channel outer channel walls is less than the width of the bottom channel whereby two such top channel walls may slide into a bottom channel of a stackable tray of like kind and where the width of two adjacent bottom channel outer channel walls is less than the width of the top channel whereby two such bottom channel walls may slide into a top channel of a stackable tray of like kind application_number US 16903598 A description referring to fig1 a stackable egg shipping tray 10 suitable for injection molding as a single piece has a horizontal tray bottom 11 integral to two vertical side walls 12 and 13 running a substantial length of the tray bottom 11 in an egg tray multiple egg receiving receptacles 14 make up the tray bottom 11 a poultry egg not shown may be packaged for stacking transport or storage by inserting the egg into one of receptacles 14 which are arranged to hold eggs in an industry standard honeycomb configuration the egg tray specifically illustrated in the figures and described in detail here is suitable for use in an egg incubator such as the one described in u s pat no 3 147 737 referring to fig2 each egg receiving receptacle 14 is defined by a set of partitions 16 arranged to form a hexagonal cell to receive an egg and tabs 14a at the bottom of the cells to support the egg the.