This feeder was designed to attract wild finches and chickadees to feed and frolic in your yard. These colorful songbirds bring with them their sweet, warbling song and vivid plumage. They are a bird-watcher’s delight! The yellow plastic feeder base screws onto empty plastic soda bottles to make attractive, affordable wild bird feeders. All you add is the thistle (nyjer) birdseed. Yellow. MSRP: $3.30 each. Your Cost: $1.65 each.