The Feed/ Water Cup is easy to remove and fill. It has a plastic guard that keeps debris inside cage. They are easy to clean and fit all bird cages, both vertical and horizontal bars. To use, Unscrew Nut and Lift off Washers. Remove the Cup From the Holder By Twisting It Counter Clockwise. Follow the Diagram On the Back of Package to Affix Feeder to Cage. Fill Cup with Seed Or Water. Set It Into the Holder and Twist Clockwise to Lock. Product is made with Plastic. Holds about 11.2oz
