Stay refreshed when answering the call to action with this Call of Duty Epic Six Pack Heat Change 10 oz. Mug – the perfect way to stay alert and hydrated while on another epic Call of Duty Zombie campaign. 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 Call of Duty Epic Six Pack Heat Change 10 oz. Mug is an ideal gift solution for birthdays, Christmas stocking fillers or even the office Secret Santa. Hand wash only. Not dishwasher safe. Do not microwave.