Inexpensive red and white plastic, push-fit poultry drinker suitable for adult hens. Capacity 5 litres water.
Fill the container whilst it is upside down, it has a flat top to be able to do this, then push the base back on and invert it swiftly. The water will fill the saucer until it covers the outlet hole. As the hens drink, so more water will drip out to keep the saucer level the same.