Eddy said soap typically requires five to six ounces of breast milk, which costs $30 for six bars. Diaper cream and lotion are $15 each. “I have teamed up with a local mom, too, for anybody who is not lactating. They can get some breast milk soap, too. Just go on my Facebook page, and you can order with me,” Eddy said. She says she makes sure to keep everything sanitary while she works to make the different soaps, lotions and diaper creams.