There really aren't any plans. It's like a giant mason jar. Find a bucket with a tight fitting lid. Fill it with water and turn it upside down. Let it set for a while to see if it will leak. Place a 1/32" (1 mm) drill bit in your drill motor and drill a hole every so often around the lip of the bucket. I made them about 1/2 (13 mm) inch or less. Make sure the closed lid doesn't block the holes.
You will probably want to keep the rain and sun off it, the rain will drown the bees who got too excited, the sun will warm the feed until the air pushes it out the holes. I find they fight a little, and there was about a dozen dead bees on that bottom board I'd put the feeder on, but I couldn't tell you if it was because of fighting, overeating, the heat, or they had overworked themselves.