The bird feeders, built with poly-lumber proudly made from recycled plastic and milk jugs, carry a lifetime guarantee to never crack, split or fade. They are constructed with stainless steel screws. Our recycled products have fully routed edges, aluminum rust-resistant hinges and thick heavy-duty acrylic panels. The patented removable seed tray in hoppers and platform feeders provide excellent drainage to keep the seed dry and makes it easy to keep the feeders clean.