These polyethylene cage cups keep food or water clean and off the floor for a healthier environment for small animals and poultry. Built-in hooks allow them to clip to any wire hutch or coop, indoors or outdoors. They work well for rabbits, hamsters, guinea pigs, chinchillas, ferrets, and poultry. Available in 1/2 pint, 1 pint, and 1 quart sizes and in black, blue, green, or purple.