Simple, but brilliant! I’ll never pour can liquid down the drain again!
A little bit of pea liquid goes a long way so don’t use peas or very little or put it in a separate container for when you cook dried split peas. Beet liquid is fine but you may not want pink soup, lol. And you may not want green soup from spinach but your mileage may vary. Green beans, any of the other pinto/red beans, carrots, corn or that can of sweet potato you opened today is fine.