A friend gave us his old oven mitts when he moved out of his boat last year. I cut them up, combined, and re-stitched them into a sort of tea cosy for our percolator(which we use as a kettle).
When we need hot water refills for tea we can keep water warm for a while this way :> (we don't have a teapot, but this works fine).
@rek Frankenstein's Mitten