I had a small deep fryer that had a lid like that. Couldn't clean it lid kept coming down on your hand it was just unhandy gave to Goodwill.
The wolfgang Puck small pot lid comes off. Really just big enough for one person , maybe 2 depending on what your serving. It has a tendency to boil over just a tad maybe I'm putting to much water/milk in it when I make mac and cheese. Put in one cup of mac and 1 cup of milk and 2 tbs of butter and when it gets to boiling it seeps out the sides a little. LOL