Food storage bags are flexible, airtight bags designed for storing food items. They help preserve freshness, prevent freezer burn, and extend shelf life by protecting food from air, moisture, and contaminants. These bags come in various sizes, often made of durable materials like plastic, and may feature resealable closures or zip-lock mechanisms for easy use. They’re commonly used for storing leftovers, snacks, fruits, vegetables, and even raw ingredients in both the refrigerator and freezer.