A good travel mug should do more than keep your morning coffee warm. In the UAE, where a short commute can turn into a long day of meetings, errands or driving, it should also keep iced coffee, tea and water refreshingly cool. The right mug needs reliable insulation, a lid you can trust and a size that fits your daily routine. Our overall pick is the Owala SmoothSip Slider, which combines a comfortable drinking spout with a leakproof closure and…