The Perky-Pet Grand Master Feeder features six feeding ports, a wide-mouth design and holds 48 ounces of nectar. The Grand Master truly is the Granddaddy of them all. With its large capacity for nectar, hummingbirds from all over the neighborhood will be flocking at your house! For best results, use Perky-Pet Instant high energy nectar. This specially blended nectar is easy to use, requires no boiling and stays fresh longer.