I crocheted two different “Coffee Moustache Sleeves”: one made of hemp and one made of cotton. The sleeves taper towards the bottom so that they fit the coffee cups well and will not slip down.

The free patterns to both are available in this blog post along with ideas for modifications such as edging and different appliques: https://www.allaboutami.com/moustachecoffeesleeves/

The moustache pattern is free courtesy of Red Heart and can be found here: http://www.redheart.com/files/patterns/pdf/LW3685.pdf