Trek Tumbler

The tapered shape fits my car's cup holder perfectly, and the handle makes it easy to grab while I'm walking the dog. My coffee stayed hot for hours, and the outside never felt wet or sweaty even in the heat.

The double-wall insulation really works—my iced coffee stayed cold through a two-hour hike with zero sweat on the outside. The lid seals tight enough that I tossed it in my bag without a single spill, and the tapered shape makes it easy to grip even when my hands are full.

Finally a tumbler that actually fits in my car's cup holder without wobbling, and the tapered shape makes it easy to grab with one hand. The lid seals tight enough that I can toss it in my bag without worrying about leaks, and the outside stays completely dry even with ice-cold water.