I had no idea there was such a thing and the fact that two of my favorite kitchen gadgets have been combined into one is the greatest! I gave away my old crockpot and only use this one! I love that I can cook the most tender meats with all that flavor along with all the other items I want! The way this brings out the flavor is 5 stars alone! This is my new favorite kitchen gadget and everyone who’s been over when I’m cooking with it now wants one. I e had so much experimenting with new recipes and new ways of cooking old recipes. I’m obsessed!