The goal of a high-altitude bottle holder is to keep fluids in their liquid state for as long as possible. Dynafit attempts to achieve that goal with the Alpine Bottle Holder, which is an insulated version of the Universal. The holder fits most hard bottles and attaches directly to the shoulder strap of Dynafit and possible other packs. A bungee cord helps keep the bottle from rolling down into the valley below. The Dynafit Alpine Bottle Holder saves pack-space by keeping your liquid in front of your face. It’s good at maintaining dihydrogen monoxide's liquid state in cold environments. 29 grams (1 ounce).