Slow cooker technology has come a long way in the past few years, as is evident in our top pick from GreenPan. The metal, ceramic-coated inner pot heats up quickly and doesn’t take much elbow grease to clean. During our tests, it cooked tender beans and fall-apart pulled pork. It can slow cook, steam, simmer, keep warm, and sauté. The exterior also stays cool while it’s in use.