If you cold look close you would see there is wire by over the hole and the whole way around the feeder I never get drowned bees . My bees are sucking down a feeder full{gal.} in little over a hour.I have used the same feeder with good results -but it needs to be modified. I place a piece of screen wire over the hole that lets the sugar water into the bowl. If no wire, when the feeder is empty, the bees will crawl through the hole into the inside of the feeder and die. I also place about 8 rocks in the feeder trough to keep the bees out of the syrup.
Charlie