Ran across this the other day. There is a plastic bottle hack where you can make a self-watering seed starter! It is at about 8:25. So clever!
https://nyc2.unblockvideos.com/index.php?q=aHR0cHM6Ly93d3cueW91dHViZS5jb20vd2F0Y2g_dj01alVjaHFKNGxJQQ
Thanks for the link.