Crafted at HARIO’s Fukaya Factory with innovative thermal-reactive ink printing, this unique mug transforms its colors based on the temperature of your drink.
It’s not only fun to look at, but also gives you a visual cue to enjoy your beverage at the perfect temperature.

Hot Drinks: When the temperature rises above 50°C, the print turns pink, signaling a warm and cozy drink.

Cold Drinks: With drinks below 15°C, the print shifts to blue, instantly telling you it’s refreshingly chilled.

Experience both flavor and color in every sip — a daily mug that combines functionality, surprise, and the beauty of Mt. Fuji.

Made in Japan.