Make sure you remain refreshed when out on the battlefield with this super-cool Black Ops 4 Heat Change Mug. Fill it with your favourite hot drink and stay alert whilst taking on enemies from the comfort of your own home. This standard size mug has a capacity of 300ml and features Ruins graphics emblazoned on a heat changing decal. Watch the image change when you pour in your hot drink, turning from a dark black to a bright orange The Black Ops 4 Heat Change Mug is a great birthday gift or Christmas stocking filler for lovers of the Call of Duty Black Ops franchise, as well as video game lovers in general.