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. Mucki Bird Grass is a supplementary feed. Bracket: 10 x 13 cm Dish: 10 x 8 x 3 cm * Vermiculite is a water retentive, non-toxic & virtually mould-free mineral clay.