Washing Machine for Emergencies

I just bought this emergency washing machine from Emergency Essentials. It looks a little like a plunger. (In fact, some survivalist books say you can use a clean plunger. But this one has been engineered to do a better job on clothing- see the grill? That keeps the clothes from getting sucked up into the plunger, and creates a vacuum to pull the water through the clothing better.)

You take a 5 gallon bucket and cut a hole in the lid for the handle to stick through. Put water and detergent in the bucket with the clothing, and beat the clothing like you are churning butter.

I think it looks like it would do a better job than scrubbing on a washboard, which some of my boys had to do on their missions.