... smooth surface, metal elements contained comply with food tableware grade.Cap: made from PP, injected to shaping. PP material with ... Now, the most choice of cap of swing top cap is PP. Compare to ceramic cap, PP cap has its advantage—simple production ... the contact information:Sales DepartmentShantou Friend of Bottle Swing-top Cap Industry CO.,LTDAdd: Neilong Industrial Zone, Waisha Town, Longhu ...