China High Frequency Welding TPU Airtight & Watertight Zippers for Insulated Lunch Bags Cooler Bag Factory Custom 30kpa, Find details and Price about China Cooler Bag Zipper, Zipper for Bag from High Frequency Welding TPU Airtight & Watertight Zippers for Insulated Lunch Bags Cooler Bag Factory Custom 30kpa