Description: Cup Model # 300 This listing is for (4) automatic cup style drinkers with built in triggers. This model is for mounting the drinker directly to you waterer, whether it be a bucket, pail, large pipe etc. Simply drill a 3/8″ hole into your bucket and thread on your drinker. Drinker cup is a breeze to clean as it is a quick disconnect orange cup. This unit will provide many seasons of trouble free use and can be used for many different birds. Cup utilizes a trigger system that automatically fills when the chicken pecks it.