Smallest crock I've seen is 2 quarts and that seems a bit large.
I still have my 1 Qt Rival Crock-Ette. Bought it years ago from WalMart when I lived the Bakken Oil Fields, but the one in the link is similar. It's fairly basic...plug it in to turn it on, unplug it to turn it off. I used to cook small Pork Roasts or Beef Pot Roasts and Beef Stew and it got pretty darn hot.