The Sweet Corn Products NO/NO Forest Green Mesh Lantern Bird Feeder contains no plastic or wood. The all-metal construction makes it sturdy in all types of weather and more sanitary for your feathered friends to feast from. The collapsible wire mesh basket holds a generous 6lbs of black oil sunflower seed. There is plenty of room for 15-20 birds to feed together. The tray at the base is equipped with drainage holes to keep water from building up. Due to the metal construction, NO/NO bird feeders don't need to be cleaned as regularly as plastic feeders. If you'd like, though, you can simply run it through the dishwasher.