So, let’s talk more about how and when to use these bags and what you can expect when yours arrive. The snack/sandwich bag is perfect for those snacks on the go or school time lunches. They fit an entire sandwich and up to five cups of small snack items like fish crackers. The sandwich bags are lined with a food safe TPU which is attached to the polyester print. These bags can be hand washed and are even top rack of your dishwasher safe!