In a saucepan on the stove, add 1 cup of water. Measure out and set to the side 1/4 cup of white sugar. Bring water to a boil, then turn heat off and add sugar; stir until the sugar dissolves. Remove from heat and cool. Pour into empty bottles.
Replenish bottles every 1-3 days, especially during the summer, to keep nectar fresh and bacteria-free. **Red dye is dangerous to hummingbirds. Please DO NOT add dye to nectar!**
And always, be careful around hot stoves and hot sugar water!