Thanks for the link. I'm leaning towards ordering it as I can see anything that claims to work below zero. Did you use it through the summer? Did I keep the water cold, too?
I've been using it for the last several months at least. It keeps the water nice and fresh, no algae. I wouldn't necessarily say that it keeps the water cold, but it's so hot and humid here, I'm not sure what would. Sometimes on the hottest days, I dump some ice in there.