How else but by knitting scarves for the mugs!
I actually got this idea from a very old Bon Appetit magazine. They were featuring a small town in up in the mountains of France (Chamonix, I believe...and I have been there so it caught my attention). Years later, World Market ended up selling these mugs scarves (lucky me!) so I bought what they had and knit up the rest myself.
To knit up these scarves, I recommend sock weight yarn on a size 1 needle.
CO10 sts for a flat scarf - working up a small 1x1 rib along each edge until scarf measures 17 1/2" long.
If you want to mimic the store bought scarf:
CO20 sts and join in the round.
Knit until scarf measures 17 1/2". BO all sts, add fringe to each side -- approx. 1 1/2" long (cut 3" lengths).
Block well to prevent curling.
If desired, embrodiery candy canes, Xmas trees or snowflakes on one end of the scarf.
It may be alot of work - but it is so worth it. I have had these scarves for at least 10 years and I don't feel festive until I drink my coffee out of a scarf laden mug!