Featuring a 100% sucrose formula, this Perky-Pet® instant clear hummingbird nectar provides the highest amount of energy to hummingbirds. The 2 lb bag makes up to 192 oz of clear hummingbird nectar, so you're sure to have enough to keep your hummingbirds coming back for more. This hummingbird nectar concentrate is easy to mix: Simply stir in water and it's ready to use. The chart below features some of the more common hummingbird feeder capacities and how much concentrate and water to use to get to your desired fluid oz of nectar.