Star Wars Lightsaber Heat Coffee Mug

I had to put boiling hot water straight from the coffee machine to see the change but other than that this mug was the tits. My husband loves it!

Already gave the mug to my boyfriend but it's great! It has to have like really really hot liquids to work though

It came on time, and was a super cool gift for my boyfriend! He loves it and uses it all the time!