I've used these for years. What I love about them is that although they lose their little round shape, they don't rust or corrode. You can use them and use them some more, until you just decide to get new ones. I use them mainly on the outside of my pots to maintain their shine and make sure that the darkening creating by using them on my gas stove top. Since the inside rarely stick, although I have used it inside of mine, if your pans are teflon coated on the inside, definitely don't use them i...