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Took this on a hike last weekend and my water stayed cold the entire six hours, even sitting in direct sun. The grip on the bottom actually kept it from sliding around on the rock I set it on.

This lid seals completely, no spills even when I toss it in my bag on the way to work. The double-wall insulation keeps my coffee hot for hours.

I've been using this tumbler daily for about three weeks and the ice is still there when I get home from work. The construction feels genuinely premium too, no rattling or flimsy parts. Style and performance actually delivered on both.