I buy large tuperware container 2.5 gallons, then cut 2 holes in it.
sand down any rough edges so gliders don't get cut. then put in cage.
www.meijer.com/shop/en/kitchen/food-storage/rubbermaid-easy-find-lids-rectangle-food-storage-container-2-5-gallon/p/7169146350
this is what I use rubbermaid. I use it upside down, put food on lid then
put clear part on as top and food cover.