Experience the magic – just add hot water to reveal your hidden image on this personalized 15 oz Color Changing Magic Mug! At first glance this custom color changing mug looks like your standard black mug, but upon adding hot liquid you can remind yourself (or convice yourself) I Think I Love My Job.
 
• Size: 4.5″ height x 3.4″ outside diameter
• Made with ceramic material.
• Hand wash only.
• Not microwave safe.
• US Patent #: 6,281,165 6,759,099 6,902,775 7,166,333.