Product review (4 stars): Convenient sink washing machine requiring no electricity
If you are willing to work at it, this is a great little machine.  It will fit three throw blankets (I have dogs and wash 10 a week).  Soaking may be required for dirtier things.  As well as extra turning.  The base is a little flimsy as you turn it, but all you have to do it hold it.  The downside:  this does not spin your clothes like a washing machine, so be prepared to drain your clothes.  Yes, it has a tube for a drainer, but this only gets out the majority of water.  The clothes will still be wet.  I use a salad spinner for small items or a laundry basket in the sink on its side for larger.  All in all, if you don't want to have a washing machine, buy this.  Note, I use a dryer to dry after I have let the clothes drain in he sink,