If you are going totally non-electric for winter water, i highly suggest rubber dishes. They are sold at TSC and are a kind of rubber tire material. The ice sticks to the other dishes, and they can crack when you are trying to chip it out.
The rubber dishes bend, and the ice don't stick so all you have to do is flex the dish and it pops right out!
This is what I use. Sometimes it can be hard to pop out the ice if the rubber pan was full, and it froze solid overnight into a big block. If a night is going to be especially cold, I turn over the pan when I put them to bed at sunset. It isn't like they'll be drinking overnight, and I am out there when the sun comes out with fresh.
My goats have deeper, rubber buckets for water. They get fresh too twice a day. Usually a thin crust of ice forms by midday, and I just use a rubber mallet I carry with my while outside to break it up.