A zarf (plural: zarfs, zuruuf, zarves) aka coffee sleeves, coffee clutches, coffee cozies, hot cup jackets, coffee collars, and cup holders, are roughly cylindrical sleeves that fit tightly over handle-less paper coffee cups to insulate the drinker’s hands from hot coffee.
The word zarf is likely from Ottoman Turkish ظرف (zarf), from Arabic ظَرْف (ẓarf)
