Originally Posted by dr_finklestein
My SWMBO would kill me if I did this with our gear!
Then get an old blanket at good will! I do this too, works great. However I should note that I still get temp losses as described here with the blanket. I am tempted to shoot foam into my lid as well, but I just keep thinking, how is that different than putting a heavy blanket on top? Think I am going to continue to pursue some kind of floating/cleanable mash cover.