Very happy with the purchase of this bag. My previous experience with similar reusable bags was from the Colibri brand, which has a double layer (cloth exterior and semi-waterproof interior), where as these bags are made from just a single layer of a pleasant, semi-waterproof material. Even though I enjoy the bags of both of these companies, the upside of the Bumkins bags are that they dry much faster after being washed. (I hand wash mine and air dry.) They store things like dry food snacks (nuts/dates), sandwiches, and even things like veggie sticks and fruit slices really well, when packed in the morning and taken for day-use. Cannot comment on how good they are on maintaining moisture levels of foods over longer periods of time. They have great designs, are super easy to wash and use, and zippers work perfectly.