I’ve used the lizard bedding very successfully in pin cushions. In addition to the shells, I put scrap wool batting in any “odd” shapes (if doing chickens or other creatures) so that they stay “stuffed” and that the filling doesn’t settle out of that area. I also put batting in to cover the fill opening before sewing it closed. This helps to keep the filling away from the opening as you see and provides another barrier so that it doesn’t leak out through your hand sewing. The oils in the wool batting help keep pins from rusting.