I keep 16 hummingbird feeders going during our season (May - October). I've tried just about every feeder made. These are, hands down, the best I've found. They hold enough nectar (PLEASE do not add food coloring - could be harmful) but not too much. I clean and refill daily, and these are easy to care for with the proper tools. I only wish squirrels couldn't remove the flowers quite so easily because then bees get inside.