JJdward,
The bucket is an empty Delicat cat food container from Sam's. I liked it because it was square.
I'm thinking about a 5 gal round plastic bucket design since they are more available to everyone. Maybe a funnel upside down in a coffee can to slope food toward the exterior holes. I wonder?
Unless ducks have some primal genetic instinctual fear of sticking their head in a hole to eat, it should work. Get a bucket and cut the holes, forget about the inside piece, and see if they take to it. you will only be out one bucket.
There are so many good ideas on here. Just search "homemade feeder or waterer" and there are thousands of good ideas.
The mind boggles.
UPTHECREEK,
Thanks for the compliment, but I'm just a piddler with too much free time.