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It’s basically a flask that doubles as a carry-on, which sounds gimmicky until you’re at the gate with your coffee and laptop in one hand. The double-wall keeps things hot for hours, and the shape fits snugly in the seatback pocket.

The vacuum insulation actually does its job—my coffee stayed hot through a three-hour train ride, which is more than I can say for my old thermos. And the slim shape means it slots right into the side pocket of my backpack without bulging. It's become my default carry for every commute.

I love how this bottle fits into my bag without taking up extra space—it's like having my travel mug and a personal item in one. The vacuum seal actually keeps my tea hot for hours, which is perfect for long days out.