Grip-seal or Self-seal bags, Zipper bags, grippa bags and minigrip bags. Ideal where you want to secure contents and avoid leakage or contamination – grip (or self) seal bags have a simple plastic ridge that clicks shut and pulls open for continual re-use. The slider & zipper bags have a closure that enables you to slide open and shut the bag – perfect for storing of food, hosiery, stationary articles and daily