With its two easy-to-close zippers, the new Ziploc Double Zipper
seal creates our tightest seal ever. The Double Zipper seal is
now available on Ziploc freezer bags. With their tough, durable
plastic, Ziploc freezer bags are specially designed for the harsh
freezer environment. Costco has a full range of Ziploc items,
including the EZ Zipper and handy sandwich bags.