Perky-Pet 64 fl oz Ready-To-Use Red Hummingbird Nectar is already mixed so it's so convenient for you and just right for the hummingbirds! The Perky-Pet Ready-to-Use Nectar has been created to suit hummingbirds' taste preference. Made with 100% sucrose, the red nectar in this 64 fl oz bottle requires no boiling. Convenient ready-to-use formulaMade of 100% sucrose – an essential energy source for hummingbirdsNo boiling or mixing – just pour and go!