Hot or Cold Coffee Mug Changes Colors Whee
This simple, clever mug automatically indicates its current state of mind when you pour a hot beverage into it.
When the coffee cup is cold it’s black and reads “OFF”, when a hot liquid is poured inside, it turns white and reads “ON”. Pretty clever, huh? I’m not impressed either. But my girlfriend went bonkers over this, claiming it’s the best invention of her lifetime (she’s dumb as shit).
