Here is a great way to stock up on some sponges! You can get a 20-pack of 3M multipurpose sponges for only $7.99 (reg. $35). That makes each sponge only $.40! Shipping is $2.99 or free with a $15 purchase. The sponges have a soft side and scrub side that can scour tough messes and clean delicate surfaces without scratching.
They also have an easy to hold shape to make cleaning easier. This is a really great price and you can get 3 separate deals to really stock up.