We know that not all fats are bad. We also know that not all fats are good, too. Too much fat in a sauce and it can feel and taste bland or empty, but too much and its overly rich and greasy. The Oxo Good Grips Gravy Fat Separator uses simple chemistry to achieve its goal: the hydrophobic fats and oils rise to the surface as they have a lower specific gravity, and the sauce can then be distributed through the silicone spout at the bottom of the separator. Very clever, very simple and an easy way to remove unwanted fat from a delicious gravy!