COLD - Will only react to COLD liquids. Currently our most detailed in color change. Sakura and Peach Blossom will bloom PINK, and the Plum specifically blooms RED only in this set.
HOT- Will only react to HOT liquids. All Sakura, Peach Blossom, and Plum will change into a LIGHT PINK blossom.
DUAL (HOT & COLD) - Will react to BOTH HOT & COLD liquids. All Sakura, Peach Blossom, and Plum will bloom LIGHT PINK when HOT, and BLUE when it is COLD.
Due to the delicate thermal reaction, there are rare cases where certain parts of the world are too hot or too cold that the cups arrive fully bloomed and activated out of the box. In this case, we recommend to serve them at a different season or apply a heating or cooling method to reset the cups back to original blank white with branches. Gentle hand wash is recommended to preserve the longevity of the cups and ink design. We advise against using a dishwasher for our cups.
A Traditional Masterpiece
Crafted and hand painted by local Japanese artisans, inspired by artworks painted by Kitagawa Utamaro. Each 'o-choko' (sake cup) Sakazuki is painted with a special non-toxic thermochromic pigment ink, and then coated with a food grade clear ceramic glaze, to seal in the color changing ink.
Color Changing Feature: The color changes when the temperature of the hot color changing cup is above 103°F, and the color changes when the temperature of the cold color changing cup is below 70.5℉. The pigment is temperature-sensitive materials are painted on the cup body and coated with a clear glaze, the materials used are heat-sensitive materials, high temperature resistance of 608 °F, non-toxic, , BPA-free, lead-free, chromium-free and meets the FDA/EU standards.