This is a brand new item, just taken out of the box. This non-insulated automatic waterer is made by Bar-Bar-A, check out their website (www.horsedrinker.com).
Here's what they have to say, "The reason we do not need electricity for our livestock water feeders is that there is no standing water in the unit. The unit is either filling or draining. As a result there is no water left to freeze in the winter or get scalding hot in the summer. With no standing water there is no possibility for slimy algae growth. This means that you don’t have the weekly cleaning of algae found in horse tanks and even other automatic animal waterers.
Purchased as a gift that was never given, never been used, has been in storage for several years, check the website - retails over $400