The “Double Copper-Top” nesting feeder is our largest and most popular fleece feeders. The top is made from copper and protects the fleece from direct rainfall and gradually ages to a delightful green patina. This larger version of our single-copper top holds twice as much fleece or 2 suet cakes when used as a feeder. This one Comes filled with xtra fleece. Can also hold 2 suet cakes during the winter. Transfer to fleece in mid April when birds begging to nest!