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I've been using this tumbler at my desk and the insulation keeps my coffee hot for hours without any condensation. The lid seals tight so I can toss it in my bag without worry.

Filled it with ice water before a hike and there were still cubes rattling around six hours later. The lid seals tight enough that it hasn't leaked in my bag yet, which was my main worry with tumblers like this.

Took this to the office and my water was still ice-cold at 5pm, which never happens with my old tumbler. The lid seals tight enough that I can toss it in my bag without worrying.