Homestead Clear Hummingbird Nectar Sugar Concentrate 32 oz. (4372) is a delicious nectar with natural sugars which most of the birds love to eat. It is specifically designed and formulated to attract birds and it consists of vitamins and calcium to boost bird's health. It's easy to use by just adding water to liquid nectar concentrate. It comes in a re-sealable container which would allow you to use what you need and to have the rest stay fresh.