I Love Heart Blackburn Mug Design: I Love Heart Blackburn Mug. Design on both sides of the mug 100% dishwasher safe, at any temperature and with any tablet 80mm diameter. 92mm high Packed in a special polystyrene mug postal box and bubble wrap bag, well protected from any bumps and droppages that might happen to it as it travels through the postal system. Safe worldwide delivery.