PLASSON makes the world’s most reliable poultry bell drinkers. Made of a rugged high-impact plastic, formulated to withstand the ravages of the active poultry house for many years, each bell drinker features a features a large bell trough and heavy duty spring designed especially to accommodate large Adult Turkeys.. Plus, Plasson bell drinkers ensure a constant water level and a dry floor; once a bird drinks as little as 10 grams (0.3 oz.) of water, this highly sensitive and maintenance free system is activated. Our bell drinkers support new humane growing practices for complexes with natural certifications.