Amazon has a cheap deal for a 3-pack of Scotch-Brite non-scratch scrub sponge. It's typically priced at $5.99 but it's on sale for $3.
To get an even better deal, check out with Subscribe & Save for 5% or get 15% off with five or more subscriptions. You could pay as little as $2.55 for three sponges.
Browse more cleaning supplies and Subscribe & Save deals.