We have been enjoying watching hummingbirds eating from our Perky-Pet feeder so much. Within a couple of days the hummingbirds found it and must have invited all their friends. It's super easy to make up the solution for them and it feeds them for about five days. Mix 1 cup of sugar with 4 cups of water (1:4) in a saucepan and boil for two minutes to kill bacteria in water. Food coloring is not recommended or necessary, the red feeder attracts the birds. Change solution if it becomes cloudy, as this could make the birds sick. There are easy tips online for cleaning it using water and uncooked rice. I loved it so much I bought one for my son's house and am considering buying another for mine as they are coming to feed five or more at a time.