March 23, 2014 - No Comments! Cloud Coffee Cup Magic Mood Mug, or Cloud Coffee Cup Tasked with mission to come up with branded swag to give out at Weather Underground events I wanted to come up with something less likely to end up in the trash than a logo on a pen. Temperature sensitive ink on a coffee mug. No coffee (cold) and you get a storm cloud, fill it with precious precious hot coffee, and the sky clears right up. I use mine daily.