Prevue Pet Products Hooded Ceramic Cup holds 4 oz. and features a universal screw on attachment for use with most wire cages or crates. Available in black or white only, the 1240 cup measures 2 3/8inches in diameter and 4 .5inches high with a 2inches diameter opening. Inspect the cup periodically and remove from use if it becomes worn or damaged. Wash with warm water using a damp soft cloth and mild soap, dry thoroughly before returning to the cage.