Review on 👜 Commercial Grade Nutri-Lock Vacuum Sealer Bags - 2-Pack 11x50 & 8x50 Inch Rolls - BPA-Free Food Saver Bags for Sous Vide & Meal Prep - Enhance Your Foodsaver Experience by Angie Cole

It would be so great if they could actually hold a vacuum. As a test, I sealed 1 cup of dry oatmeal. I followed the instructions exactly. After 1 hour a significant amount of air re-entered the bag. I did the exact same test with a roll of branded bags and couldn't get any air in them at all. This is especially important when cooking sous vide, as sealed bags must remain submerged in water at all times during cooking. If air gets into the bag, they float up and the food can spoil. So it's not worth much if they don't hold a vacuum.