The Convenience Nectar Mixing and Storage Device consists of a container that is divided proportionately to allow for the precise measuring of the recommended sugar to water ratios used for nectar type bird and butterfly feeders. The device is adapted for supporting a removable divider that separates the container into proportionate volumes, 4 to 1, 6 to 1, and 9 to 1 that correspond to the commonly recommended sugar to water ratios for hummingbird, oriole, and butterfly nectar feeders. The device allows for the water and sugar compartments to be filled to the same “line of sight” level to facilitate the making of precise nectar sugar to water ratios. Once the sugar and water compartments are filled to the same level, the divider is removed to allow for mixing. In the preferred embodiment of the Convenience Nectar Mixing and Storage Devices, the container divider can be used as a stirring implement and lid to cover the container during storage.