These containers are ideal for mixing epoxy resins and polyurethane foams. The graduations display volumetric ratios for all kinds of mixes. You can add epoxy and then the hardener right on top or use two containers to mix later. Keep several pitchers on hand when mixing large batches of foam. Pour it, have it ready and you can mix it as you need it. In addition to the various mix ratios, the 16 and 24 oz. cups are graduated in milliliters and ounces. The 2.5 and 4 qt. pitchers are graduated in quarts, ounces, liters and milliliters.