360 DEGREES Vacuum Insulated Narrow Mouth Water Bottle - 750 ml / 25 oz., BlackThe 360 Degrees Vacuum Insulated Stainless Narrow Mouth Bottle (750ml 25oz) keeps your drinks hot or cold in a more durable, outdoors ready design than your standard thermos flask. Made from Edelstahl 18 8 stainless steel, the Vacuum Insulated Stainless Narrow Mouth Bottle (750ml 25oz) is resistant to dents, punctures, and rust, so it will survive anything you throw at it (or rather, throw it at) in the great outdoors.