I don't usually make a practice of doing product reviews on this blog, but this product is just so cool, I have to tell you about it. I'm not affiliated with the company in any way. I just thought this was an interesting product.
Soapnuts are nothing more than the dried fruit of a Himalayan tree (Sapindus Mukorossi). They contain saponin, the natural substance that makes soap soapy. You just put 3-4 of the little, grape-sized dried fruits into the included muslin bag, pull the drawstring closed, and toss the bag in with your load of laundry.
That's it. They get your laundry clean naturally. No petro-chemical-based detergents, no bulky plastic jugs to fill up our landfills. The 3-4 nuts you put in the bag can be used for up to 4 loads of laundry before they lose their effectiveness. Then you can just compost the spent ones and refill the bag with a few more.
You can use Soapnuts in a lot of other ways too, from household cleansers to shampoo. Check out their website for more info.