Used the lids as substrate for an aquarium and decorative pond. The beneficial bacteria loved the rough surface.
Had a small leak under one shingle where rain drains beside a window. I stapled part of the flat part under it and put a little caulking around it. Has worked for 2 years so far...
We get lots of them from take out. I use them to store seeds when they dry out. They stack well if they are one type and have lids. I could use more of these!
Used to grow cabbages.
Just don't have a kidney infection! But, they are saying that probably wouldn't matter as it couldn't compete with the soil. I tried it with a potted plant and it thrived with 6 parts water and one part urine. It grew better than miracle grow. Must be fresh.
:D