We bought a water feeder from Amazon. 
It was a death trap!
30 minutes in it took all these bees lives. Apparently there was a part that goes with it that did not ship.
I know we will lose bees, but this still breaks my heart.
Looking forward when we can add the top to the box.
Bummer. I had the same thing happen with a one gallon feeder - that was a mess. It killed about 2 pounds of bees. I'm not sure why or how it happens, but you can fix it by stuffing a little piece of window screen in the hole so that they can't crawl inside.