Bamboo is the most environmentally sound plant in the world - sustainable, cost effective, and ecologically responsible. Feeders and houses are made from Cross-ply bamboo that is 5X harder and stronger than cedar. It is resistant to bacteria and squirrels, with no rotting, warping or swelling. Nature's Way Bamboo Wave Seed Feeder #NWBWF5 offers perching options for many different birds. Easy to fill, simply lift the painted green roof. Removable Fresh Seed tray with seed diverter is made from powder-coated galvanized steel, it allows rain to drain, keeping seed dry and fresh. Easy to hang with a vinyl-coated steel mesh hanging loop.