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I've already knocked this tumbler over twice on my desk and not a single drop spilled thanks to the flip lid, which is a huge win for me. The outside stays completely dry even with iced coffee sitting in it for hours, no condensation rings on my papers.

The double-wall insulation really does the job—my iced coffee stayed cold through a long afternoon meeting with zero condensation on the outside. Both lids fit snugly, and the straw lid has survived being tossed in my bag without a single leak. Solid tumbler for everyday use.

I was skeptical about the flip lid holding up over time, but it snaps shut with a satisfying click and hasn't leaked once in my bag. My coffee stays hot through my whole morning commute.