Collegiate Trek Tumbler

The tapered bottom fits my car's cup holder perfectly, and the flip lid hasn't leaked once during my commute. I've already used both of the included straws, and they're a nice bonus.

The double-wall insulation actually works—my coffee stayed hot through a two-hour lecture, which is more than I can say for my old mug. The flip lid seals tight enough that I tossed it in my bag without a second thought, and having two straws means one’s always clean.

The flip lid seals tight enough that I tossed it in my backpack with zero leaks, and the double-wall insulation kept my coffee hot through a two-hour lecture. The two straws are a nice bonus for switching to cold drinks, and the tapered shape makes it easy to grip on the go.