Just go to your local deli and ask for the empty gallon pickle jars. Make sure they are glass, plastic expands and contracts with temperature and will leak.
The just put a 4 or so 1/16" holes in the lid and invert it over the hole in the inner cover and place an empty deep around it and then the cover.These show a quart jar, but the principle is the same
Cheaper than a quail feeder and although the quail feeder is much better than an entrance feeder, it still requires the bees to break cluster to get to the feed. With the inverted jar, the cluster can move right to the feed.