The slider closure makes these bages easy to open and close! Keep your food fresh with ziploc slider bags. Each bag features a slider closure and an expandable bottom that opens into a flat base, helping the bag stay upright so it s easy to fill. Plus, these bags feature our smart zip seal it lets you hear the bag close so you can feel confident your food is protected. ahighlights: a slider closure makes these bags easy to close, easy to open a flat base helps prevent items from getting squished a filled bags stand side by side in most refrigerators, freezers and pantries a great for storing bulky items a store food.