When you add hot water, Captain Kirk, Mr. Spock, Lieutenant Uhura, and Dr. McCoy leave the Transporter Room on one side of the mug and materialize to explore the planet surface on the other side of the mug. Energize!
Do you know a Star Trek fan who doesn't have one yet?
Holds 14 oz / 400mL. Disappearing mugs are not dishwasher safe but are microwave safe.