航海家隨行杯（附透明翻蓋及吸管）

I've been using this tumbler during my morning commute and it fits perfectly in my car's cup holder. The double wall insulation keeps my coffee hot for the whole drive, and having two straws is a nice bonus.

The flip lid is convenient for one-handed sipping while driving, and the double-wall insulation keeps my coffee hot for a good couple of hours. I just wish the straws were a tad longer for taller cups.

Really like that the lid seals tight enough to toss in my bag without worrying about spills. Handles fit the car cupholder perfectly, though the straw could be a tiny bit sturdier.