First Nature Lantern Style Sunflower Seed Feeder. Count on First Nature to come up with a feeder that feeds either black oil or gray stripe sunflower seed or a mix of both. Made of durable material, the hopper and base can be easily washed with warm soapy water. The seed hopper has a large 5 pound capacity. The base, which fills from the bottom, has two different sizes of feeding slots some placed horizontally and some vertically. The different sizes accommodate the two sizes of sunflower seed and accommodate various species of birds at their natural feeding heights. Feed the birds in your yard some Sunflower Seeds.