Deuter Insulated Bottle Holder - The holder made of insulating thermal material reliably keeps drinks in drinking bottles with a diameter of 74 mm at the right temperature, even in the cold season. The drawstring closure also ensures that the contents of the bottle holder stay in place with every movement. And because it is important to drink enough fluids, the Insulated Bottle Holder can also be used in addition to the hydration bladder, as it is compatible with the drinking tube attachment on the shoulder strap.