Yep, cut one in 1/4's.

Even better? I actually found a sponge at Wal-Mart in the camping section that is preloaded with camp suds, where you rip a section off. It is prescored and everything. For those who like a little woods friendly soap it is something to look into (or for car camping). It was under $2 if I remember...
_________________________
Freezer Bag Cooking, Trail Cooking, Recipes, Gear and Beyond:
www.trailcooking.com