I have no idea what these are actually SUPPOSED to be used for. I drilled holes in the tops and all sides, filled them with lil' rectangles of felt, and then poured peppermint oil all over the felt (and myself). I had read somewhere that all kinds of animals HATE peppermint. There has been something coming in my front courtyard every few weeks in the early morning. It's either a squirrel (probably not.it would be there during day, too), a big turtle (that would be nice, I like turtles), an armadSee full review