Trek Tumbler Flip Lock

The double wall really holds up—my coffee stayed hot through a whole morning of meetings, which surprised me. The flip lid opens smoothly with one hand too, and I love that I can rotate it to fit however I’m holding the cup.

The quarter turn threading is genius—I can set the lid exactly where my left hand wants it without any awkward twisting. Double wall keeps my coffee steaming for at least three hours, which beats every other tumbler I've owned.

I was skeptical about the flip lid keeping things hot for hours, but it really does—my coffee was still steaming at lunchtime. The double wall insulation works way better than my old travel mug, and being able to rotate the lid to four positions means I can finally sip comfortably with either hand.