NWT Cotopaxi Batac 16L Backpack - Brand new condition! Our bestselling Batac 16L Backpack is a streamlined pack that deploys for fast-and-light daytrips, hikes, and other excursions. It's unstructured for easy loading and features a main zippered compartment along with a front vertical-zip pocket and two mesh water bottle pockets. Available in two sizes; the 16L is the smaller size.