The DropCatch Magnetic Bottle Opener is a bottle opener you mount on your wall and as you open beer bottles, a magnet catches the bottle caps as they fall and collect on the mount until you dispose of them. There is a junior and senior sizes, the junior sized bottle opener will hold up to 15 bottle caps, and the senior sized bottle opener will hold up to 52 bottle caps. Now it's just a matter of gaining some friends so that you can bring them over and impress them with your new bottle opener, because I suspect Grandma will not be too dazzled.