Galvanized Hanging Poultry Waterer

I have used these handy Little Giant waterers in my quail cages for several years. They save floor space, and prevent spills and pooping in the water. They work great for water for quail, and would probably be useful as additional waterers for chickens or chicks when you want to be sure nobody is bullied off the water.
I see people in reviews also using them to present grit and calcium supplements, though I cannot imagine it works as more than just a handy hanging pocket for solids. With...

Galvanized Hanging Poultry Waterer