Or you could just fill the tub, and have some hose lying around to siphon it into containers the old fashioned way. Or, you could just scoop it out. I don’t mean anything by this but the contraption looks like a real waste of money.
It keeps flies and skeeters and their larvae out of the water. Which for me is worth the $20 backup to my four 55-gallon plastic drums in the celler. And the 2 and 3-liter jugs in the pantry. And the 400-gallon *water buffalo* trailer parked behind the deuce-and-a-half. But parked empty in the wintertime.
Redundancy brings comfort, but should not generate complacency.
I live in an area where a slimy pink bacteria forms in any water left standing for more than a couple of days. Keeping it in an enclosed container might lessen the slime.