These sponges are great!  I just bought the Euro Sponge Cloth no.20 at Whole Foods- they come in a three pack for $4.  A three pack of sponges last as long as 17 rolls of paper towels!  The cellulose used in making the sponge cloth (and that's just what it is- it acts like a paper towel, but absorbs like a sponge!) and 99.7 percent of their waste is used in production of the sponges!