Description Semi-automatic drinker, British made and designed by BEC to use old water tanks, buckets, feed and any other type of container turning them into reservoirs for your birdsâ drinking water. Self-filling, with built-in float valve, multi-use drinker with a cup capacity of 0.50 liters (1 pint). It can be fitted to water containers or tanks with a water depth of up to 72". It is easy to fit, maintain and use. Ideal for outside or indoor use, the MaxiCup drinker cup is hard-wearing and suitable for most pets, including chickens, ducks, geese, quail, game birds, wild birds, even dogs and cats. Easy to assemble, just drill a 1/2" hole and attach. Comes with a washer/gasket, wing nut, and filter. Filter helps prevent potential contaminants from blocking up the water flow into the cup. Made in the U.K. of quality materials. Unlike many of the other cheaper-made drinkers, MaxiCup does not leak, and there is no need for your chickens to press a float valve to release the water, it is self-filling.