Free homemade soap (it's blue!) -- from Cloud 9 Salon Spa
The company's Web site says that glycerin is made in its soap and that it's a natural by-product of the soap-making process that is removed when commercial soap is processed because it's a valuable by-product.
Glycerin is a humectant -- a substance that moisturizes the skin.
The blue bar of homemade soap is supposed to last as long or longer than a commercial bar, if kept dry between uses.