Cellulose sponges are made from wood pulp, and the small holes inside them help to absorb liquid and hold it inside the sponge. These sponges are soft inside their sealed packaging because they are usually treated with a soap that keeps them pliable and keeps bacteria from growing inside the package.Cellulose sponges are very inexpensive. They absorb and hold liquid well and can last through some fairly tough cleaning jobs. 

Cellulose sponges work well on a number of surfaces. They can even be cut into smaller sizes to provide more uses out of each sponge.