A zipper-seal is a type of closure commonly found on plastic bags, allowing for easy sealing and resealing. It consists of two interlocking strips that create an airtight seal when pressed together. This design helps keep food fresh and prevents spills, making it popular for storing snacks, leftovers, and other items. Zipper-seal bags are often used in kitchens and for organizing various household items. They come in various sizes and are typically made from durable plastic. Many brands, such as Ziploc, offer these bags, which are also useful for travel and outdoor activities.