5 set of Automatic Cup/ plunger style Drinker with a built in Plunger Float that  Can be connected to a water line either Gravity fed or Low Pressure Pump Fit's with a PVC Slip that is included 

The advantages of having the Automatic Drinker cup set is that you don't have to micro manage the chickens what as often it's sanitary since it works of the plunger the bird get as much water it needs, leaving no mess with stagnate water afterwards and less disease prone as the refillable containers are.