The reusable option.
20 cloths
100% cotton flannel cloths.
This is the same fabric old fashioned flat nappies are made of, and your gran will tell you that after her babies grew out of nappies, they went on to become the best cleaning cloths for years and years!
(And yes, they are the same ones as offered on 5 pack but in bulk, they make fabulous baby cloths too)