The Medium Quadripod comes standard with two heavy duty, clear acrylic food/water cups. The cups are made in the USA of non-toxic plastic and are heavyweight enough to stand up even under the toughest beaks. They are dishwasher-safe and can be used in your bird's cage, as well as on the Quadripod stand.
The cups attach to a stainless steel bracket that fits up under the perch. The bracket is designed so that the cup handles fit under the bracket/perch, where they cannot be unscrewed by eager beaks.
Medium Quadripod cups come in three types/sizes:

The half-round cups slide off the bracket for easy cleaning, while the round cups must be unscrewed from the bracket. Although the half-round cups are convenient, we recommend the round (stationary) cups if your bird likes to "play" with his/her food, since he/she might find enjoyment in sliding the half-round cups off the bracket and dumping the contents.
Choose the 5 ounce size cups for small to medium size birds using the Quadripod and the 15 ounce cups for larger Cockatoos and Macaws.