While you wake up with a mug of coffee, the Flash will zoom (oops, how awkward!) around this heat-sensitive mug, making sure all is good.Seriously, Barry. They’re sorry about that zoom comment. Please don’t erase their existence! The exterior of this officially licensed mug transforms from black as hot liquid is added, revealing the hidden image in full vivid colors. Please note - while this mug may be used in the dishwasher or microwave, for the longest lasting, highest quality product, they strongly recommend against it.
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