Pennington Natural Springs Hummingbird Food is ready-to-use straight from the bottle. Do not add sugar or water. The ready-to-use formula in Pennington Natural Springs Hummingbird Food contains no fluoridated water and is enriched with vitamins and minerals. Pennington Natural Springs Hummingbird Food should be refrigerated after opening in its original container. The tiny hummingbird must have high energy, nutritious food, and consumes up to half its body weight daily. The major diet of the hummingbird is the nectar from the flower.