Has anyone ever put the whole cooking thingy (the ceramic inner bit - I don't know what it's called) in the fridge? If I have leftovers or a change of meal plan I usually empty the food into a tupperware container before fridging it but I was thinking that just putting the whole thing in the fridge would cut down on washing up (I have lazy-housewifeitis) but then I though that it might crack when being reheated....