Small and very quick Double Moss stitch mug cozies with button closure. Just takes a little scrap yarn and 2 buttons.
For the smallest mugs and sizes 13 yards may be all you use, but this can be sized upwards for even a French Press - using closer to 40 yards.
Most mugs will range from 13-25 yards depending on needle size, mug size, yarn weight… let your imagination go wild or keep it simple.