I bought a liner that is used in wire flower baskets it is made of coconut husks. Kind of matted about 3/4" thick. I cut it to fit my nest boxes - I use kitty litter buckets - and used 1/2 " self tapping screws to attach it to the front rim. The girls love it. The eggs stay clean and in one piece. They have shown no sign of wanting to eat it, but they have fluffed it up a bit scratching around. I will post a picture.