I've been putting some worms in my raised beds and feeding them the fresher kitchen scraps. I'm starting to run out of spots to place the food, so for the next bed I build I want to put in some-type-of-mesh holes that go 1-2' down and are simply to to form a hole that doesn't cave in, into which I can throw worm food for the ultimate purpose of direct composting.
Here is the design:

So, some design questions are:
- What would make a good mesh? Chicken wire with 1/4" squares? Large chicken wire + large-mesh burlap?
- Will the worms be able to eat from this resevoir and readily go back into the soil?
- Do I need to cover the hole or place soil on top of the fresh food?
- Rectangular prism or circular prism hole?
- What else to consider?
Thanks.