Paper cups are hot to hold too - I don't think 0.5mm of paper is a particularly great insulator, at least in my experience. A 100% biodegradable and easily remo

Paper cups are hot to hold too - I don't think 0.5mm of paper is a particularly great insulator, at least in my experience. A 100% biodegradable and easily removable (not glued) cardboard sleeve would do the trick like it does with a paper cup I reckon.