Two containers. Let the worms live in the lower one for a while and make their magic.
Then you put food in the upper one and they all crawl up a level. Then, you use the stuff from the lower one and put it on top.
It’s just a way to move the worms out of the fertilizer so you keep the worms in their place and don’t dump the worms onto your garden.
I wouldn’t say it is “fancy” – just a couple of rubbermaid-type plastic containers – maybe 24″‘ x 16″ and 6″ deep with holes in the bottom plus a couple of bricks.
