This is one of the items people don’t think about stockpiling but I have a nice stack of them under my sink.
It’s nice if I make a dish that is really hard to clean (i.e. I burn it) to get a clean sponge after I am done ruining the previous one!
Right now you can print a coupon for $1.00 off any TWO O-Cel-O™ Scrub Sponges  .
This should make them about $.50 at Walmart if yours carries the single packs!