Large 304 Stainless Steel bowls AND holders lock down to prevent birds from tossing bowls. Bowls lock to ring with thumb screw on outside of cage. Bowl is about 5" at lip and about 3-1/4" deep.
Yes, they are expensive, but they will be the LAST bowl you will purchase! These are the only bird bowls on the market where both the bowl and the holder are both medical grade stainless steel!