Print several now, fill them up during the year, and leave them under the tree as presents...
This is the alternate to the Sphere Piggy Bank. I wanted something that looked cooler than a piggy. The pyramid will definitely be easier to print than the sphere. The base is 100mm or about 4 inches. Traditional design - shake 'em out or cut it open (if you're careful, you can superglue it back together for reuse).
Oh, and pyramid power will multiply your money!