Why haven't we heard of these before? Introduced to the U.S. market in 2004, Zamuta Soapnuts are nuts from India's Rithra tree. The nuts contain a natural detergent (saponin) and can be used in laundry, in allergy-free shampoos and in general-purpose household cleaners. A small amount of crushed nutshells in a cotton bag can be reused multiple times for laundry... Recommended for those with sensitive allergies, soapnuts and soapnut powder can be ordered directly from Zamuta Soapnuts. There are also instructions for making your own natural lotions and soaps. Have any ATers tried Zamuta Soapnuts before? Via: The New York Times.