The one-way degassing valve adds cost to a package. In the 2 oz and 4 oz sizes, the cost of the valve proportional to the package itself is relatively high. We also have customers who use the 2 oz and 4 oz bags for snack foods, pet foods and other things that don’t need a degassing valve as coffee does. In order to make the price of the 2 oz and 4 oz bags accessible to the largest number of customers, we choose not to include a one-way degassing valve on our stock products. For customers who need a valve on a 2 oz or 4 oz bag, we do provide the option to customize the 2 oz and 4 oz bags with a valve.
For more information on customization, please visit the Stock Bag Custom Services section of our site.