I use a large dog water bowl in my small coop, filled it 2/3 with sand and set a plastic waterer on the sand. When the temp gets subzero, I add an insulated cover made of a plastic plant pot and some bubble wrap insulation. Plastic waterers should not generally be used in direct contact with a...
And well worth mentioning again this time of the year - no need to be rude.
Some folks use a heavy rubber feed tub, made for livestock, and just put out fresh water a few times daily. You can flip the tub over and give them a good thump, and the ice pops right out.
Remember that chickens...