I have 13 in there with the tan containers they've been in there since Saturday early Sunday I haven't added any feed to what was there. I have 9 in with the red container haven't added any there either. One tan container is a waterer they use it just like the feeder. Make a 1/2 inch hole maybe 1.5 -2 inches up from the bottom of the container. Egg cartons work to, i just have more creamer containers than I do cartons.This would definitely save a lot of money... This is my first-time chicken keeping so I don't have any feeders on hand. How long do you think the feed lasts in the feeder? I leave for a couple of hours a day so I want to make sure that nothing goes wrong.