Schitt's Creek , David Rose - I'm Trying Very Hard Not to Connect with People Right Now - Color Changing Mug - Reveals Secret Message w/ Hot Water.
From Schitt's Creek.
The mug starts out a glossy black color. When hot liquid is added the brilliant color message appears and the mug turns white! Surprise your friend with a secret message.
To see it in action click here!
Available in 11oz.