You wake up early, painstakingly craft cowboy coffee over your camp stove, toss it into your water bottle and hit the trail. Five miles in, it’s time for a pick-me-up. You reach for your brew, only to realize that it has gone cold, or lukewarm at best. There is nothing worse than cold coffee out on the trail. While standard water bottles and Nalgene bottles are perfect for filling up at the next glacial stream, their performance in keeping coffee, tea, or other hot beverages at their desired temperatures is uninspired. These scenarios call for a specialized piece of equipment: the double-walled, vacuum insulated-water bottle. Most will keep your beverage of choice hot for about six hours, and cold for more than 24, if that’s more your speed. These eight bottles represent the best on the market, and are strong candidates to become your favorite piece of trail gear.