One important thing to note is that it doesn't have a 'ball' on the valve like most water systems - these 'ball' systems can harbour bacteria which is not sanitary for your birds.
The large stainless steel valve is our strongest valve, designed specifically for the larger parrots. It stands up to punishment from macaws, cockatoos, Congo greys, large amazons, etc. This valve is also tough enough to be used by monkeys, dogs, and other large animals.
Size: 7oz water system - great for travel carriers