New to Pupsik: Very affordable Biomom Silicone Bags that can be used for all kinds of food or non-food storage. s/biomom/ Compared to Stasher, which uses zip loc closure, these bags rely on special plastic sliding part that keeps the bags firmly locked. There are pros and cons. It takes slightly longer to open and close but the seal is so tight you can even carry liquids inside! Unlike slasher, the bag will not open even you press on it like on an inflated balloon.