This is a serious thermos... i coffee in this, sipping on it frequently, was finally losing its temp 7hrs into my hike. Unreal!! If you filled it with hot beverage, and left it closed completely full, i bet it would stay quite Hot for 7 hours or more no problem... seriously no joke. Build is awesome, the only thing i dont like is the location of the clip loop, I like the Klean Kanteen loop top style much better, but small sacrifice for an indisputable working product.
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