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The reveal takes about 10 seconds after I pour hot water in, and the Grinch's sneaky face is just perfect. Really adds some fun to my morning tea routine.

Poured in my coffee this morning and watched the Grinch’s face slowly appear on the side of the mug—such a fun little surprise that made my whole desk smile. The heat-sensitive reveal is smooth and the mug holds a good amount for a cozy winter drink, I just wish it came in a bigger size.

The reveal is so much fun—watching the Grinch's face appear as the mug heats up makes every coffee break feel like a tiny Christmas morning. It's held up well in the dishwasher too, which I didn't expect.