what is the material of the paper cup ?

For the single wall paper cup material is 1st food grade pe coated paper/pla coated paper .

For double wall paper cup ,inner layer is 1st food grade pe coated paper/pla coated paper .

and the outer material can be choosen ,(1.the same as inner layer. 2.white card paper )

For ripple wall paper cup ,inner layer is 1st food grade pe coated paper/pla coated paper .

the outer material is ripple paper.