Stay refreshed when answering the call to action with this Epic 6 Pack Heat Change Mug – the perfect way to stay alert and hydrated while on another epic Call of Duty Zombie campaign. A standard sized mug (capacity 300ml), just add a hot drink to see the image change, filling up the empty zombie 6 pack and providing the extra boost needed while in the midst of battle. The Epic 6 Pack Heat Change Mug is an ideal gift solution for birthdays, Christmas stocking fillers or even the office Secret Santa. The epic Call of Duty (COD) games franchise first launched in 2003 and has since become one of the best-selling video game series of all time, with numerous sequels and spin-offs. With millions of loyal fans keen for ever more simulated warfare from the masters of the genre, COD has become an industry staple, and returned to its roots in 2017 with the launch of Call of Duty WWII to much fan praise and critical acclaim. Previous titles such as Modern Warfare, Black Ops, and Infinite Warfare have made this record-breaking franchise one of the most popular ever created, and that popularity is set to rise further with a future movie franchise also in the works. The Epic 6 Pack Heat Change Mug is an officially licensed product.