Salomon Insulated Hydration Kit
Here's what other sites are saying:
Running through the desert with an overheated hydration reservoir is almost as bad as skiing with frozen water. Fix both those problems with the Salomon Insulated Hydration Kit. This reservoir features a smooth brushed shell that slides into sleeves with ease, and 80g insulation covers the water reservoir and hose to prevent it from overheating and freezing in extreme temperatures. It's incredibly lightweight too, so you won't sacrifice your comfort in order to stay hydrated.