Got this mug while touring space X
This past summer. 
Changes color when hot liquid hits it.

https://static.noagendasocial.com/media_attachments/files/111/183/308/582/456/521/original/f380069791840f90.jpeg

https://static.noagendasocial.com/media_attachments/files/111/183/308/591/998/706/original/248b9a175763dee9.jpeg