All these months of gradually deplasticking our daily lives. I wonder why it took me so long to get around to this obvious subtitution. Sure, the water still contacts the solid plastic in the delivery/refrigeration system, but at least it isn't sitting for days and days in a number-7 bottle. I think the home-brewing 5 gallon glass carboy looks a lot nicer too. I thought it might not fit, or would wobble too much to be safe, but it's a fine fit and seems stable enough for a low-traffic corner location. Full to the brim, and lacking a handle, the glass bottle would be unwieldy, but filled half way it's easy enough to install.
It would probably be a little awkward to refill one of these with purchased water, but we don't. We refill our bottles from the tap. The water cooler is just a way of having water available cold, at little kid level, and without waiting a minute for a glass as is necessary with our double-filtered drinking water tap.
Fiona announced our new water rig excitedly: "Bigger! Heavier! Less toxic!"