I was just dumping out a box of used Keurig cups at work and thinking, if I had a bunch of those I could use them instead of gravel to fill the bottom of large plant pots . And with the holes in the cups, the water passing through would leech out the nutrients in the coffee grounds.
I have to give that a bit more thought, I think.
Sounds like a winner to me! I’ve used styrofoam peanuts when I had them, but i don’t see them as much anymore. People tend to use bubble wrap now when shipping packages.