This my current feeder. Just a dog waterer with gravel in the bowl. It works great. Very few dead bees. They empty it in about an hour. The 3 gallon water is $15 at Walmart. There is a 5 gallon available some places for $25.
I feed about 100 yards from the hives, and behind a building. My Observation Hive definitely got it's share, so I don't buy the idea that weak hives get shut out.