wholesale custom printed valve zipper flat block bottom coffee packaging bag

wholesale custom printed valve zipper flat block bottom coffee packaging bag
product details:
1.T-SHAPED ZIPPER:easy to tear zippers,easy to open the bag,save time to find tools to open the bag;
2.AIR VALVE:the air valve removes the carbon dioxide from the coffee beans and prevents the bags from bursting;
3.SIDE ORGAN：the side organ increases the side width of the bag,making it bigger;
4.BOTTOM:the bottom is widened and thickened so that the bag can stand up and be more stable.