Lye is incredibly easy to make! It's just the product of combining water with hardwood ashes, and it's essential for making your own soap.
Materials are pretty minimal. You'll need:
5 gallon (or any large) bucket
smaller bucket to fit inside the larger one. We used a clay one, but you could use any material that you can drill holes through.
Metal mesh- But do not use aluminum! Lye will eat through aluminum
piece of soaker hose