The advantage of the straight-sided drinker is that the birds can drink without having to duck under the bulge of the water container. The bowl is also wider, allowing more drinking space. Certainly these are more suitable for larger birds. The container can be stood upside-down for filling.
 
Manufactured by Crown - Original Green and White Poultry Equipment.
 
Available sizes: 1.5ltr, 2.6ltr, 4ltr and 8ltr.