The polypropylene combination pull ring cap for the plastic infusion containers is composed of an inner cap, outer cap, and rubber disc. Among them, the inner cap and the outer cap are injection-molded with imported polypropylene material, and the rubber disc is vulcanized from polyisoprene rubber. The entire production process is produced in a clean workshop with an overall grade of 10,000 and the local grade of 100. The workshop is equipped with various electrostatic dust removal facilities to ensure the cleanliness of the product. Unique design, smooth hand feel, bright color, no oil stains, sealing, and waterproof performance are more than 98%.