Everyone remembers that deathless scene from Waterworld where Kevin Costner pees in a jug, filters it, drinks some, then spits the rest into a plant. (EVERYONE REMEMBERS IT, I SAID. But if you’ve been living under a rock, you can watch here — start around 1:30.) Well, that may soon become a reality. For now, at least, we’re still not drinking processed urine — on a societal level, anyway; what you do on your time is your own business. But one ingenious conservation junkie has come up with a urinal design that filters pee in order to water plants.

Reader support makes our work possible. Donate today to keep our climate news free. All donations TRIPLED!

The idea is simple: four urinals surround a large planter. Pee goes into the urinal, goes through a series of filters, and waters the plants in the center. No spitting! Reality is SO much better than Waterworld.

One blogger suggested that restaurants could grow vegetables in the urinals — efficient! Especially if you’re interested in never selling any more vegetable dishes! — but I'd choose plants that smelled really good, to ward of gross bathroom stink and limit the need to spray chemicals like Lysol all over the place.

Grist thanks its sponsors. Become one.