This manually filled drinker is designed for 'second age' poultry with a larger diameter drinking tray which is also deeper than the 'first age' drinker to allow bigger chicks to drink more comfortably. The translucent bottle allows quick visual confirmation of the remaining water level, and the stopper at the bottom of the drinking tray makes refilling at your filling station very easy! Fill your bottle in an inverted position, replace the stopper then flip the bottle over and carry it to your birds!