Just a follow up on the Zipper Bags. I've been working on some Back Packing meals for our Backpack Camping trip on the Pinchot Trail in a few weeks. The other guys going on the trip are out spending a fortune on tasteless MRE's Meals Ready to Eat I figured I'd make my own but lets call them JAW's, Just Add Water, for the acronym lovers because technically they are not ready to eat. The bags are pretty sturdy and seal very well. I dehydrated a bunch of different meals then tested them using a cozie reheat method. The Food is Dehydrated The food is sealed water is boiled bag is opened water is poured in over the food and resealed bag is placed in cozie for half an hour to hydrate. Meal is ready to eat I only had a few bags blow out on me and its because dried foods can be sharp, especially pastas, to alleviate this issue, sharp foods are placed in a paper bag then the bag is placed in the vac bag and sealed... works great. Mashed Potatoes Bunch of meals Spaghetti's Oatmeal Cozie I want to point out that this type of sealing is brutal on the bags but they fared pretty well. So I am very happy with these bags!!!