To some people I know, a "glass of water" means a small glass about 200 ml, to others it's 500+ ml. Also, how much power does one "house" draw?

But it's moot, the point is not that you should take away "826 years" from the article, just "a very long time". Perhaps they should have written "hundreds of years" instead of creating a false sense of precision.

Also: we're talking imperial or US customary fluid ounces?

Then you can power a bigger house.