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Bought this for my desk and the flip lid is way sturdier than I expected—no leaks even when I tossed it in my bag sideways. My coffee stayed hot for a good three hours without the outside getting sweaty, which was my main worry.

Both lids clicked on tight with zero leaks during my commute, and the coffee stayed steaming hot for a solid four hours. The sweat-free outside is a lifesaver for my desk, too—no more water rings on my papers.

I've been using this tumbler for my morning coffee and the double-wall insulation really does its job—it stays hot for hours without a drop of sweat on the outside. The flip lid snaps shut securely and I've tossed it in my bag without any leaks, which is exactly what I needed for my commute.