This stunning Game of Thrones heat changing mug is sure to get your morning off to a quick start. Cold, the mug shows a partial of Jon Snow’s face with the outlines of the symbol of Stark. When hot liquid is poured in, the mug transforms to reveal the remaining of Jon Snow’s face. On the reverse, the white writing remains the same: ‘You know nothing Jon Snow’. Once the drink is finished the mug returns to its original state as it cools. An essential for any Game of Thrones display! This fantastic mug measures H10cm x W9cm and comes packaged in a decorative gift box. Not suitable for dishwasher or microwave use. © Please do not copy text. Avena product description – John Snow Game of Thrones Heat Change Mug.