Specially formulated hummingbird nectar is a premium concentrate that ends the mess of feeding hummingbirds with no messy sugars to boil or mix and no sticky clean-up. Scientific studies have repeatedly shown that hummingbirds prefer sucrose to the monosacharides glucose or fructose, and First Nature Nectar uses the finest food-grade sucrose for simply amazing results. Size: 16 oz. – makes 64 oz. (a half gallon). Just add one part concentrate to three parts water. By First Nature.