After having several "bottle" hummingbird feeders that would leak and attract bees, wasps and ants, we decided to give this design a try. I am very happy with it so far! I have not detected any leaks yet, even in this 100-degree weather we are having. Also, there have been no bees swarming it, like they do the other feeders we have. A couple have checked it out, but moved on, since there is no leakage from the seams. This is obviously due to the design, with the nectar being below the seams/feed...