Here’s a great way to try First Nature’s Humming Nectar Concentrate. This 4 oz. bottle of concentrate makes 16 oz. of feed which makes it a perfect one-time use with a 16 oz. feeder. Talk to anyone who’s used First Nature Hummingbird Nectar Concentrate and they’ll tell you they won’t use anything else. Our Hummingbird Nectar Concentrate is a premium concentrated formula which contains sucrose, preferred by hummingbirds over monosaccharide glucose or fructose sugars. There are no messy sugars to boil or mix and no sticky cleanup. In fact, you can easily mix one part nectar to three parts water right in the feeder jar. FDA Red #40 added.