This bottle cover can be used like a pouch. The pouch is zipped. Maximum value for a bottle is 1 L (32 oz.) Nalgene type (fits VERY tightly). It also can be used for a camera lens, because of 5 mm soft insulation material or for keeping the temperature of a bottle. It has molle and small velcro panel for your patch. The bottom of the pouch has a small eyelet for water drainage. The bottle on the photo is not included.