I had high hopes for this design, ants, air pressure not forcing out liquid and nice looking. But... the feeder liquid and design of the tray cause the whole thing to tilt and spill solution. When tilted the birds can get food only from the lower side of the tray.The only way to solve this is with a large weight hanging down from the center like a long candle stuck in the bottom. That puts the center of gravity lower and pulls it back to a horizontal position. Thus two stars because you can fix it but only two stars as it shouldn't work this way!