I have one of these. They are cool, but terrible as an actual cup. The solid metal acts as a radiator, and rapidly brings liquid's temperature to room temperature.
I've been using it daily for over 6 years. I always keep it in the freezer when it's not in use, with six 1" stainless steel ice cubes. My beverage has never achieved room temperature.
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u/black_covfefe_please Jun 05 '26
I have one of these. They are cool, but terrible as an actual cup. The solid metal acts as a radiator, and rapidly brings liquid's temperature to room temperature.