Cup sleeve is made of two layers paper board, can be used for single wall paper cups.

And they are reusable and low cost. Prevent your fingers from burning.

Corrugated sleeves, for hot beverages, embossed to provide insulation from hot paper cup. 
Fits full range of paper hot cups.Branded, Sturdy, thick paper. 
Textured design provides a good grip. Protective Corrugated Disposable Hot Cup Paper Sleeve.