The DUO 26oz Bottle features single-wall 100% recycled Aluminum construction and has a unique designed 2-openning screw-on lid. Drink comfortably through the small top opening. Easy refilling, cleaning, and filling ice cubes through the larger opening. It comes with a built-in comfortable handling loop for easy carrying. To keep your DUO Bottle in peak condition, we recommend hand-washing only and following the included care guidelines.