Abstract: Expanded polystyrene food packaging tray, with partially open cells, with the ability to absorb liquids inside it, whose external surfaces are of closed cell type, hydrophobic. This way, an apparent surface glazing is formed which is continuous and uniform enough, that the produced material is comprised of one single layer, without coating by surface membranes for the retention of liquids (non-laminated). The external surfaces appear to be liquid repellent/hydrophobic, smooth, continuous and uniform and remain clean and dry. The above products are perforated with several small openings for the liquids to penetrate inside them. Method of production of the above.