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The fact that it keeps tea warm for a full hour is a game-changer for my long train commutes. I just toss in a few leaves before I leave the house and I'm sipping something properly steeped by the time I hit the office.

Brought it on a chilly weekend trip and my loose leaf stayed properly hot for the full hour, which is exactly what the description promised. The lid seals tight enough that I tossed it in my bag without a single drip.

The keep-warm claim held up on a two-hour train ride—still steaming when I finally poured. Fits perfectly in my bag and the brewing basket catches every leaf, so no grit at the bottom.