I was reading about nature and natural products and was amazed to read that we had detergent growing on trees - yes, you read it right. I am talking about soap nuts. The online material suggests that they could be packaged properly and used even with a washing machine. 100% natural and as good as (or even better than ) the detergent that we buy from the supermarkets. Soap nuts are also used in Ayurvedic Medicinal system for treating hair-loss.