Apply an even strip of liquid nails around the hole. Lay the 2" x 2" screen on top of the liquid nails and press down lightly. If you use liquid nails, let dry for 24 hours.

You could also tape the edges of the screening down with duct tape.

You can put holes in the bottom for drainage. If you do, you should place some type of tray under the bin to catch liquids and screening over the holes to prevent my friends and me from escaping.