... when drink hot water,coffee,and hot noodle,,,,only one wall paper cups/bowls become very hot,in rder to prevent hands from ... design, and has the functions of automatic paper-feeding, sealing , trouble alarming and counting. Double wall paper cups have two layers(walls), the inner is ... out layer is the jacket with printing.So to make double wall paper cups need two types machines, 1.to make the inner cup ...