These bags are great for the purpose I use them, which is dry snacks. We felt so wasteful using plastic zip lock bags, and were over using toddler snack cups with the amount of space they take up, these looked like a great alternative. I bought these and Stashers to compare, as I was looking for something to store kid snacks in that they could just grab and go without help.Stashers definitely have a better seal, but still are not leak proof. These Zip Tops are also not leak proof, but I felt they let the same amount of air out that the Stashers did. It does state clearly on the package, and in the description before ordering, to stand upright when using with liquids. Therefore, I can not find them at fault with leaks with liquids. But I wouldn’t store liquids in zip lock bags either.That being said, I love the Zip Tops better. The stand on their own is great, especially for using them as storing snacks that the kids can just grab and eat directly out of the bag. They are definitely easier to clean inside the dishwasher and dry nicely. I feel like the Stashers have tough to wash/dry spots, and takes longer to dry. The Stashers are also harder to open, my kids can’t open them and it’s a struggle for me. Plus they feel more delicate then the Zip Locks.I will be buying more Zip Locks. They will be great for backpacking and cooking meals in too!