トレックタンブラー

Took this on a long commute and the tapered shape slid perfectly into my car's cup holder without wobbling, which was my main worry. The lid seals tight enough that I tossed it in my bag sideways and not a drop leaked. Outside stays completely dry too, so no more condensation rings on my desk.

My coffee stays hot for hours and the outside never gets that nasty sweaty condensation ring on my desk. The tapered shape with that handle makes it so easy to grab one-handed while I’m walking the dog, and the lid hasn’t leaked a drop in my bag.

Finally a tumbler that actually fits in my car's cup holder without wobbling, thanks to that tapered shape. The handle makes it easy to grab while I'm rushing out the door, and the outside stays completely dry even with ice-cold water inside.