a tube-shaped piece of material that is put around a cup for hot drinks, to stop you burning your fingers when you hold it

Did you know the cardboard thingy around a coffee cup is called a zarf? 你知道咖啡杯的一圈薄纸板叫“zarf”吗？

a decorative object made of metal and with a handle, used for holding a cup for hot drinks

Because the liquid is so hot, the cup is then placed into a decorative holder called a zarf. 因为热饮太烫，杯子会被放进一个叫“zarf”的装饰性杯形托里。