Collegiate Trek Tumbler

The tapered base fits right into my car's cup holder without wobbling, which is exactly what I hoped for. Double wall insulation keeps my coffee hot through my whole morning commute, and the flip lid hasn't leaked once when I've tossed it in my bag.

The tapered bottom fits perfectly in my car's cup holder, which is rare for a tumbler this size. I've tossed it in my bag with the flip lid on and not a single drop leaked. The two straws are a nice bonus since I always lose one.

The double-wall insulation actually works—my coffee was still steaming after a two-hour lecture. The tapered base sits snug in my backpack side pocket too, and the flip lid hasn’t leaked once since I got it.