The Mcage Lot of 4 Black Plastic Seed Water Feeder Cups are perfect for feeding your birds. These cups are made of high-quality plastic that is BPA free and non-toxic. The black color of the cups will attract birds to the feeder, and the smooth surface is easy to clean. The cups have a lid that is easy to open and close, and they come with a straw that you can use to fill the cups with seed or food. The cups are available in a pack of four, and they cost $3.50 each.