This time I got the Idea of comparing products based in a little funny experience. I bought a sponge for my feet in the supermarket. I was wondering what should I buy?, and decided to try something new. Why not to try the sponge?, it is several times less expensive than other items. After using it a couple of minutes I realized it was not a good investment. I was not very happy about this. Next time in the supermarket I picked up a stone, what we call in spanish “Piedra Pómez”. This one not only lasts much longer, but it does the job of removing old skin from your feet very well! In my opinion, the stone wins over the sponge! Do you have any thoughts on it? Which one do you prefer? Let me know?