A container comprising a pair of bars extending across opposite sidewalls; wherein each one of the opposite sidewalls comprises an opening comprising a lower corner, an upper corner and an intermediate corner between said lower and upper corners the bars are movable between: i) a lower stacking bar position in which pivot ends thereof rest in the lower corner of the opening, ii) an upper stacking bar position in which the pivot ends rest in the intermediate corner of the opening and iii) a nesting position in which the pivot ends rest in the upper corner of the opening.