This nesting material basket is great for any type of nesting fibers your bird prefers. The basket design encourages your birds natural behavior to forage for nesting material . This version is an open top basket designed to be placed on the outside of the cage for easy refilling. However Its versatility allows you to place inside the cage as well . You could also use these for larger supplements like leafy greens to keep your bird entertained and promote the natural foraging behavior.