This coop cup securely bolts to any wire cage to hold water or food. Removes easily with a twist of the wingnut. Easy to clean and extremely durable. Made of 14/4 stainless steel (14 percent chrome/4 percent nickel). Available in 16-ounce. Measures 5-4/5-inch length by 5-1/2-inch width by 2-1/2-inch height.