This larger Chicken Kooler is made for the medium backyard flock, between 6-20 chickens. 3.5 gallon pail with the standard EZ access lid and level hanger to offer a larger volume of water than the CK1, the CK2 features 3 drinker valves. The transparent blue reduces algae growth and allows you to monitor the water level easily for your birds. The EZ access lid allows you to quickly add or remove water, vitamins, and electrolytes without removing the big lid to your Chicken Kooler. Set yourself free from dumping contaminated chicken water!