Very basic cup with a screen hot glued and a wire that fits thru the screen. I use the smallest cup I can without feeders getting out and put it in a corner so the drip system don't drown them.
I just use a Dole gelatin cup with holes drilled in the bottom currently.
But I have a friend (who works with resins as a hobby) fiddling around with a design in an attempt to make something a little more visually appealing since I mentioned that I couldn't find anything that I wanted when I saw her last week.
Chinese plastic take out container. They're about 5" x 8" and about 2.5" deep. Just enough for discoids and totally stupid crickets not to be able to climb out.