Inexpensive storage for all of those little paint bottles. I need three more of these units, as I have that many more bottles of paint to corral. Each tray holds between 21 and 27 of the smaller bottles of paints. These will soon be living on a shelf unit (with drawers) my wonderful dh is building for me. That's one of the perks of his remodeling my wet studio and he didn't need about a third of the materials we bought. I have left over wood for shelves and drawers!!!