Took the Traveler on a weekend hike and it held up great. The 36 oz size is plenty for two people, and the two lid covers really do work as 10 oz cups, which made sharing a warm drink at the top easy. It stayed leak-proof in my pack and kept the temperature well. The flat sides give a solid grip. Lining up the logos with a quarter turn for pouring takes a try or two, but once you get it, it works nicely.