Pet birds need fresh food for their daily vitamins. This dish contains everything that you could ever need to grow your own bird grass a mineral substrate (vermiculite*) stores water which is then slowly released providing a constant source of water for the little germinating plants. just simply add water & within a few days you will have a dish full of tender green shoots. The dish can be placed in the included bracket & mounted in the cage so your bird can help itself to fresh food whenever it feels like it * Vermiculite is a water retentive non-toxic & virtually mould-free mineral clay.